CN214873377U

CN214873377U - Pressure control structure and laser direct engraving rubber plate

Info

Publication number: CN214873377U
Application number: CN202022471566.6U
Authority: CN
Inventors: 门容宇
Original assignee: Guangzhou Tiangong Ruidian Technology Co ltd
Current assignee: Guangzhou Tiangong Ruidian Technology Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-11-26
Anticipated expiration: 2030-10-30

Abstract

The utility model discloses a pressure control structure and laser direct engraving rubber plate for laser direct engraving rubber plate, the pressure control structure sets up in the periphery or the blank department of above-mentioned laser direct engraving rubber plate, and this pressure control structure comprises from low to high or from high to low a set of at least sign of range of arithmetic difference, and the arithmetic difference height between the adjacent sign is the micron order, and this pressure control structure sets up sign more than 1. The pressure control structure may be composed of at least two sets of marks each having the same number of marks. The pressure control structure can provide a very clear numerical indication for an operator, and the operator can adjust the printing pressure according to the printed mark. In addition, whether the concentricity of the printing cylinder meets the requirement or not can be checked through keeping consistent number of marks printed by at least two groups with the same number.

Description

Pressure control structure and laser direct engraving rubber plate

Technical Field

The utility model relates to a flexographic printing field especially relates to a pressure control structure for flexographic printing, specifically is used for the printing quality control of flexographic printing, especially in the aspect of the control of printing pressure.

Background

In the flexographic printing process, a flexographic plate mounted on a plate cylinder is directly pressed against a printing material attached to a printing material support cylinder, so that ink on the flexographic plate is transferred to the printing material. If the printing pressure between the flexible printing plate and the printing stock is too small, the ink can not be fully transferred, and the print is empty and incomplete and is printed in a missing way; if the pressure is too large, the flexible printing plate material with elasticity is excessively deformed, so that the printed pattern is deformed and expanded and becomes fuzzy, and the pattern is seriously distorted. In addition, the concentricity of the two rollers is required to be good, otherwise, larger vibration can be generated, not only can the pictures and texts be printed in a missing mode, but also the tension of the paper tape can be inconsistent, the deformation of the paper can be aggravated, and the fault can occur.

Therefore, in the flexographic printing process, the control of the printing pressure plays an important role in the quality of the final print. The control of the pressure in the current art is only controlled by a measure of the set pressure on the printing press, but the expression of the set pressure on the sheets on the printing press is not intuitive nor digitally expressed. The traditional flexographic printing plate of the flexographic printing process is a photosensitive resin plate, and the traditional optical exposure plate making process cannot process images and texts in the printing plate in different depth directions, so that the printing pressure cannot be visually and quantitatively displayed, and the function of controlling the pressure is not provided.

Meanwhile, the concentricity of the two printing cylinders needs to be checked and corrected by other equipment such as a dot measuring instrument, the deviation control of the concentricity is in millimeter level, the deviation is relatively high, and the control is complex and time-consuming.

Therefore, it is desirable to provide a pressure control structure for flexographic printing plates, which aims to solve the problem of printing pressure control in the flexographic printing process and also to check and correct whether the concentricity of the printing cylinder meets the requirements.

Disclosure of Invention

The utility model discloses to the problem that exists among the prior art, a pressure control structure for flexographic plate is provided, this technique is based on the direct sculpture rubber version technique of laser.

Compared with the traditional photosensitive resin plate technology, the laser engraving is a new plate making technology, and the rubber plate is a new flexographic printing plate material. Conventional optical exposure plate making cannot form a set of logo patterns having a height of a continuous equal height difference at a certain position of a photosensitive resin plate, and laser direct engraving plate making can finely customize the shape and height of a printing plate. Therefore, the utility model discloses the advantage of make full use of laser direct engraving plate-making provides a pressure control structure for flexographic plate.

The technical scheme of the utility model is that: the pressure control structure is arranged at the periphery or the blank of the rubber plate and consists of at least one group of marks which are arranged from low to high or from high to low in an equal difference way, and the equal difference height between the adjacent marks is in a micron order. The pressure control structure can be provided with more than 1 mark, and the highest position of the pressure control structure can be the same as the height of the printing surface of the rubber offset. The marks can be lines, any geometric figures or characters except the lines.

The utility model discloses in, when the printing plate received printing pressure, the part of pressure control structure co-altitude is printed out. For example, when the printing pressure is small, only the 1-2 marks with the highest height can be printed; when the printing pressure is high, all the marks can be printed. This gives the operator a very clear numerical indication that the operator can adjust the printing pressure according to how much the logo is printed.

The technical scheme of the utility model still include: the pressure control structure is composed of at least two groups of marks, and the number of the marks in each group is the same. Through the pressure control structure with at least two marks with the same number, the number of the printed marks is kept consistent, whether the concentricity of the printing roller meets the requirement can be checked, and the checking and the correction are simple and easy to operate.

Drawings

FIG. 1 is a front view of a pressure control structure identified as a line;

FIG. 2 is a top view of a pressure control structure identified as a line;

FIG. 3 is a perspective view of a pressure control structure identified as a line;

FIG. 4 is a top view of a rubber sheet provided with pressure control structures;

FIG. 5 is a top view of a pressure control structure identified as a dot; and

FIG. 6 is a schematic illustration of verifying concentricity of a print cylinder with a pressure control structure.

Detailed Description

The utility model discloses a based on the direct sculpture platemaking technique of laser, adopt the rubber version as the flexographic printing plate. And engraving one or more groups of marks with different heights from low to high on each periphery or blank of the printing plate of the rubber plate material, wherein the content of the marks of the pressure control structure can be lines, any other simple figures or characters except the lines. Each group of marks can be composed of a plurality of marks with the same height difference from low to high, and a plurality of marks in a group have different heights, and the heights are sequentially increased or decreased. The height of the equal difference of each mark interval of the pressure control structure is in micron level (the specific value is determined according to the actual situation).

As shown in fig. 1-3, the pressure control structure is composed of a group of linear marks arranged at intervals, the linear marks are three-dimensional lines, and the group of marks are arranged from low to high. As shown in fig. 4, the pressure control strips 1 are engraved on the peripheral edge of the printing plate 2 of the rubber plate by using a laser direct engraving method, as shown in fig. 1 to 3, 10 pressure control strips are selected, which is only for illustration, the number of pressure control strips can be selected according to the requirement of the printed matter, and 2 pressure control strips, or preferably 4 to 6 pressure control strips can be used. The highest position of the pressure control line is the same as the height of the printing layout, and the height of each mark is gradually reduced. The height of the equal difference between adjacent marks is 10 microns, which is merely exemplary and not limiting. When the printing plate is subjected to printing pressure, the portions of the pressure control structure with different heights are printed. When the printing pressure is small, only 1-2 marks with the highest height can be printed; when the printing pressure is high, all the marks can be printed.

The present invention also provides other examples of pressure control structures with other patterns, and as shown in fig. 5, a group of dot pattern structures with height difference of equal height can be used as the pressure control structure, and the equal height difference of each group of adjacent dot pattern structures is 5-50 micrometers, and this value is only for illustration and not limited thereto. The dot pattern structure is used as a pressure control structure, and when printing pressure is applied to the printing plate, the generated deformation is visual. When all the dot pattern marks are printed and the gaps between dots are blurred into one piece, it is said that the printing pressure is too high. The printing pressure needs to be adjusted.

FIG. 6 is a schematic illustration of verifying concentricity of a print cylinder with a pressure control structure. As shown in fig. 4, four groups of marks with different heights from low to high are engraved around the printing plate of the rubber plate material, and the number of each group of marks is consistent, for example, each group of marks contains 10 pressure control lines. As shown in the left side of fig. 6, when the number of the four sets of the marked pressure control lines printed is completely consistent, for example, 10, after printing, it indicates that the pressure applied by the printing cylinder is consistent, that is, the concentricity of the printing cylinder is not deviated. However, as shown in the right side of fig. 6, when the number of the four sets of the marked pressure control lines printed is not completely consistent after printing, for example, when 7, 9, 10, or 5 pressure control lines are printed, respectively, it is described that the pressures applied by the printing cylinders are not consistent, that is, the concentricity of the printing cylinders is greatly deviated. Since the height of the pressure control structure at each mark interval is in the order of micrometers, the deviation of the concentricity of the printing cylinder corrected by the pressure control bar can be controlled in the order of micrometers. The pressure control structure formed by directly engraving the plate by laser not only ensures that the control precision of the inspection and correction of the concentricity of the printing cylinder is far higher than that of the traditional equipment such as a dot measuring instrument, but also ensures that the inspection and correction method is simpler and more convenient and is easy to operate. The number of groups of labels whose number of labels is identical is not limited to four, as long as two groups can be realized.

Can see through above-mentioned detailed description, the utility model discloses a pressure control structure can give the instruction of the operator very clear and definite numeralization, and what the operator can be printed according to the sign adjusts printing pressure, has fully improved printing quality, can obtain more exquisite printing pattern.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any person skilled in the art can use the local modification or modified equivalent embodiment of the present invention without departing from the scope of the claims of the present invention, and the technical features of the present invention are not left.

Claims

1. The pressure control structure is arranged at the periphery or the blank of the laser direct engraving rubber plate, the pressure control structure is composed of at least one group of marks which are arranged from low to high or from high to low in an equal difference mode, the equal difference height between every two adjacent marks is in a micron level, and more than 1 mark is arranged on the pressure control structure.

2. The pressure control structure of claim 1, wherein the indicia is a line, a geometric figure, or text.

3. The pressure control structure of claim 1, wherein the highest position of the pressure control structure is the same height as the printing plate of the laser direct engraving flexographic plate.

4. The pressure control structure of claim 1, wherein the pressure control structure is comprised of at least two sets of indicia, each set of indicia being the same number.

5. The pressure control structure of claim 4, wherein the pressure control structure is comprised of four sets of indicia, each set being disposed about a periphery of the rubber sheet.

6. A laser direct engraving rubber plate, characterized in that the periphery or blank of the laser direct engraving rubber plate is provided with the pressure control structure of any one of claims 1 to 5.