CN114872431A - Screen printing plate and manufacturing method thereof - Google Patents

Abstract

The invention provides a screen printing plate and a manufacturing method thereof, belonging to the technical field of screen printing plates, and the screen printing plate comprises: a substrate having a cylindrical shape; the pattern area is formed by assembling a plurality of through meshes which are penetrated and carved on the base material; according to the silk screen printing plate, the base material is cylindrical, the through meshes of the image area to be formed are directly carved on the base material, the non-image area is of a solid structure of a plate, and meshes do not exist, so that the strength of the formed printing plate is improved, the service life of the silk screen printing plate can be greatly prolonged, the ink leakage problem caused by aging and falling of photosensitive glue of the non-image area is thoroughly solved in the printing process, the printing quality is ensured, and the printing resistance of the printing plate is improved.

Description

Screen printing plate and manufacturing method thereof

Technical Field

The invention relates to the technical field of screen printing plates, in particular to a screen printing plate and a manufacturing method thereof.

Background

The screen printing is the most widely used screen printing, and means that the screen printing ink is leaked from the meshes (image-text parts) of the screen to a printing stock under the action of a scraper or a scraper by utilizing the principle that the meshes of the image-text parts of the screen substrate can be penetrated by the printing ink and the meshes of the non-image-text parts can not be penetrated by the printing ink, and the printing is finished because the ink of the non-image-text parts of the substrate cannot be leaked to the printing stock due to the blockage of the meshes of the screen. Screen printing can be classified into flat screen printing and rotary screen printing due to the difference in printing modes.

The traditional silk screen base material is made by coating photosensitive glue on a base material consisting of meshes and removing the photosensitive glue at the position where a printing image and text are required to be formed by exposure or laser etching technology.

However, because the base material is made of meshes, the strength of the plate material is low, and during the printing process, creases are easily generated, so that the quality and the printing endurance of the printing plate are affected, the photosensitive resist of the non-image-text part can age and fall off along with the increase of the printing quantity, ink marks are formed on the non-image-text part, and the printing quality and the service life of the base material are affected.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the base material in the prior art is composed of meshes, the plate material has low strength, creases are easily generated in the printing process, the quality and the printing endurance of the printing plate are influenced, the photosensitive emulsion of the non-image-text part can age and fall off along with the increase of the printing quantity, ink marks are formed at the non-image-text part, and the printing quality and the service life of the base material are influenced, thereby providing the screen printing plate.

The invention also provides a manufacturing method of the screen printing plate.

To solve the above technical problem, a screen printing plate of the present invention includes:

a substrate having a cylindrical shape;

the pattern area is formed by assembling a plurality of through meshes which are penetrated and carved on the base material.

Preferably, the material of the substrate is metal.

Preferably, the base material is nickel, nickel alloy, iron alloy, copper or copper alloy.

Preferably, the transparent mesh is formed by engraving the substrate by using laser engraving equipment, a laser light source of the laser engraving equipment is pulse laser, and the pulse width is 10 fs-10 ps.

Preferably, the cross section of the through mesh openings is in the shape of one or a combination of a plurality of circles, triangles, rectangles and polygons.

Preferably, the thickness of the plate forming the substrate is 50 to 100 μm.

Preferably, the inner diameter of the cylindrical substrate is 200-400 mm.

Preferably, the side wall of each through mesh is obliquely arranged from the inner side to the outer side of the base material; the angle formed by the side wall of the through mesh and the horizontal plane is alpha, and the range of the alpha is 45-90 degrees.

The invention also provides a manufacturing method of the screen printing plate, which comprises the following steps:

s1, designing the arrangement of the transparent meshes and the three-dimensional structure parameters of the meshes of the graphic area, and opening more graphic areas to generate a carving file;

s2, fixing the base material;

s3, importing the carving file of the graphic area to finish the carving of the single-opening graphic area;

s4, the engraving process of the single-divided pattern areas is repeated until all the pattern areas in the engraved file are completed.

As a preferred scheme, the through meshes are carved on the base material by adopting laser carving equipment; in step S3, the method further includes:

moving a laser beam of the laser engraving equipment to reach the position of a graphic area to be engraved, and controlling the laser beam to focus on the surface of the cylindrical base material;

in the above step, still include:

and S5, moving the laser beam of the laser engraving equipment, engraving and printing the addendum, and finishing the manufacturing of the screen printing plate.

The technical scheme of the invention has the following advantages:

1. the present invention provides a screen printing plate comprising: a substrate and a graphic area; the base material is cylindrical, transparent meshes of a pattern area to be formed are directly carved on the base material, the non-pattern area is of a solid structure of a plate, meshes do not exist, the strength of a formed printing plate is improved, the service life of a screen printing plate can be greatly prolonged, the problem of ink leakage caused by aging and dropping of photosensitive glue of the non-pattern area is thoroughly solved in the printing process, the printing quality is guaranteed, and the printing durability of the printing plate is improved.

The mesh is directly carved on the round hole formed by enclosing the plate, the use of photosensitive glue is cancelled, and the plate is more environment-friendly.

2. According to the screen printing plate provided by the invention, the plate is a metal plate, and the formed printing plate has higher strength, so that the service life of the screen printing plate is longer.

3. The invention provides a method for manufacturing a screen printing plate, which comprises the steps of integrally engraving a first open graphic area and engraving a second open graphic area.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of a screen printing plate of the present invention.

FIG. 2 is a schematic perspective view of the through mesh of the present invention.

Description of reference numerals:

1. a metal cylinder; 2. a graphics area; 3. and (4) penetrating the meshes.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The present embodiment provides a screen printing plate, as shown in fig. 1, comprising: a base material and a pattern area 2 arranged on the base material; the base material is cylindrical, and the cylinder can be directly formed by welding plates or directly formed by casting in an electroforming mode to form a seamless metal cylinder.

A plurality of through meshes 3 are penetratingly engraved on the cylinder, the through meshes 3 are further assembled into a pattern area 2, and the solid area which is not engraved is a non-pattern area 2.

The non-graphic area 2 of the screen printing plate formed by the structure is of a solid structure of a plate, meshes do not exist, the strength of the formed printing plate is improved, the service life of the screen printing plate can be greatly prolonged, the problem of ink leakage caused by aging and dropping of the photosensitive adhesive in the non-graphic area is thoroughly solved in the printing process, the printing quality is guaranteed, and the printing durability of the printing plate is improved.

Further, the thickness of the plate forming the substrate is 50-100 μm.

And in the process of carving the transparent mesh, carving by using laser carving equipment, wherein a laser light source of the laser carving equipment is pulse laser, and the pulse width is 10 fs-10 ps.

Further, the plate is a metal plate, and the metal plate is nickel, nickel alloy, iron alloy, copper or copper alloy. In the present embodiment, the substrate is a metal cylinder 1, that is, the thickness of the metal cylinder 1 is 50 to 100 μm, preferably 70 μm; the inner diameter of the metal cylinder 1 is 200-400 mm.

The metal cylinder 1 is provided with through meshes 3, the through meshes 3 are uniformly distributed, the through meshes 3 can be in various shapes, the preferred shape in the scheme is regular hexagon, rectangle or circle, and meanwhile, the through meshes 3 forming each pattern area 2 can be in a single shape or a combination of several shapes; the aperture or the margin of the through mesh of the metal cylinder is 50-180 mu m, preferably 135 mu m.

Further, the through mesh 3 can be a single through structure or a gradual through structure; as shown in fig. 2, in particular, the gradual change structure is that the diameter of the through mesh 3 gradually changes from the outer wall of the metal cylinder to the inner wall of the metal cylinder and is obliquely arranged, the angle formed by the side wall of the through mesh and the horizontal plane is alpha, and the alpha ranges from 45 degrees to 90 degrees.

Specifically, a seamless nickel cylinder having an axial length of 860mm, a diameter of 390mm and a thickness of 65.5 μm was manufactured as a base material by a fine electroforming process;

as an alternative embodiment, a seamless nickel cylinder having an axial length of 860mm, a diameter of 390mm and a thickness of 60 μm was manufactured as a base material by a fine electroforming process;

example 2

The method for manufacturing the screen printing plate provided in this embodiment is used for manufacturing the screen printing plate described in embodiment 1, and includes the following steps:

the designer designs the arrangement of the through meshes 3 of the graphic area 2 and the three-dimensional structure parameters of the through meshes 3 to generate an engraving file;

the substrate is fixed by using a special clamp, specifically, the metal cylinder 1 is fixed by using the special clamp in the scheme, so that the shape of the metal cylinder 1 is kept, and surface objects are collapsed;

moving a laser beam of the laser engraving equipment to reach the position of the graphic area 2 to be engraved, and controlling the laser beam to focus on the surface of the metal cylinder 1;

importing the carving file of the graphic area 2 to finish the carving of the single-opening graphic area 2;

repeating the steps until the carving of all the graphic areas 2 is completed;

and moving the laser beam, engraving printing additives such as position identification lines, angle lines and the like, and finishing the manufacturing of the screen printing plate of the metal cylinder 1.

Specifically, the substrate provided in this embodiment is a seamless metal cylinder 1 formed of a plate material of iron alloy material stainless steel, and meanwhile, if in an initial state, the substrate is in a thin flat plate shape and can be made into the metal cylinder 1 by laser welding; a multi-open pattern area 2 is engraved on the metal cylinder 1; the thickness is 60 μm, the inner diameter is 280mm, and the through meshes 3 which form the image-text area and are uniformly distributed are square.

In the process of making a screen printing plate, the following steps are included:

s1: the three-dimensional structure parameters of the transparent meshes 3 and the transparent meshes 3 in the graphic area 2 are designed by a designer, the side distance of the outer side surface of each quadrilateral transparent mesh 3 is 130 micrometers, the inclination angle alpha of the side wall is 60 degrees, the transparent meshes 3 are uniformly distributed transversely and longitudinally, the distance between the transparent meshes 3 is 20 micrometers, and the carving file of the graphic area 2 is generated.

S2: fixing the stainless steel metal cylinder 1 by using a special fixture to ensure that the stainless steel metal cylinder keeps a standard cylinder shape and the surface does not collapse;

s3: moving the laser beam to reach the position of the 1 st pattern forming area 2, and controlling the laser beam to focus on the surface of the metal cylinder 1;

s4: importing the carving file of the graphic area 2 to finish the carving of the single-opening graphic area 2;

s5: and repeating S3-S4, and sequentially engraving the No. 2, No. 3 and No. 4 pattern areas 2.

S6: and moving the laser beam to engrave printing additives such as position identification lines, angular lines and the like.

In order to avoid heat damage caused by laser engraving of stainless steel and realize high-quality engraving of the transparent mesh 3, ultraviolet pulse laser with the wavelength of 343nm is selected for engraving, and the pulse width of a laser source is 10 ps.

As an alternative embodiment, the substrate provided in this embodiment is a seamless metal cylinder 1 formed by a nickel plate, the thickness of which is 70 μm, the inner diameter of which is 380mm, and the through mesh holes 3 which form the printing pictures and texts and are uniformly arranged are regular hexagons; the method specifically comprises the following steps:

s1, designing three-dimensional structural parameters of the arrangement of the through meshes 3 and the through meshes 3 of the graphic area 2 by a designer, wherein the upper end is the outer side surface of the through meshes 3, and the lower end is the inner side surface of the through meshes 3; the edge distance of the outer side surface of the regular hexagon meshes is 130 micrometers, the inclination angle alpha of the side wall is 70 degrees, the meshes are staggered at 60 degrees, the mesh spacing is 10 micrometers, and a printed image-text carved file is generated;

s2: fixing the nickel metal cylinder 1 by using a special fixture to keep the nickel metal cylinder in a standard cylinder shape without surface collapse;

s3: moving the laser beam to the position for printing the pictures and texts, and controlling the laser beam to focus on the surface of the metal cylinder 1;

s4: importing the printing image-text engraving file to finish the engraving of the single-opening printing image-text;

s5: and repeating the steps S3-S4 until the engraving of all the printing texts is completed.

S6: and moving the laser beam, engraving printing additives such as position identification lines, angle lines and the like, and finishing the manufacture of the full-metal rotary screen printing plate.

In order to avoid heat damage caused by laser engraving of nickel metal and realize high-quality engraving of the transparent mesh 3, the infrared pulse laser with the wavelength of 1030nm is selected for engraving, and the pulse width of the laser source is 371 fs.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A screen printing plate, comprising:

a substrate having a cylindrical shape;

the pattern area (2) is formed by assembling a plurality of through meshes (3) which are penetrated and carved on the base material.

2. The screen printing plate of claim 1, wherein the substrate is metal.

3. The screen printing plate of claim 2, wherein the substrate is made of nickel, a nickel alloy, iron, an iron alloy, copper or a copper alloy.

4. The screen printing plate according to claim 1, wherein the through-mesh (3) is engraved on the substrate using a laser engraving device having a laser source of pulsed laser with a pulse width of 10fs to 10 ps.

5. The screen printing plate according to claim 1, wherein the cross-sectional shape of the through-mesh (3) is one or a combination of a circle, a triangle, a rectangle and a polygon.

6. The screen printing plate of claim 1, wherein the thickness of the sheet forming the substrate is 50-100 μm.

7. The screen printing plate of claim 6, wherein the inner diameter of the cylindrical substrate is 200-400 mm.

8. The screen printing plate of claim 1, wherein the side walls of each through-mesh are inclined from the inside to the outside of the substrate; the angle formed by the side wall of the through mesh and the horizontal plane is alpha, and the range of the alpha is 45-90 degrees.

9. A method of making a screen printing plate, comprising the steps of:

s1, designing the arrangement of the through meshes (3) of the graphic area (2) and the three-dimensional structural parameters of the meshes, and generating an engraving file by opening more graphic areas;

s2, fixing the base material;

s3, importing the carving file of the graphic area to finish the carving of the single-opening graphic area;

and S4, repeating the carving process of the single-opening pattern areas until all the pattern areas in the carved file are completed.

10. The method for manufacturing a screen printing plate according to claim 9, wherein the through-mesh openings (3) are engraved on the substrate using a laser engraving device; in step S3, the method further includes:

moving a laser beam of the laser engraving equipment to reach the position of a graphic area to be engraved, and controlling the laser beam to focus on the surface of the cylindrical base material;

in the above-mentioned step, still include:

and S5, moving the laser beam of the laser engraving equipment, engraving and printing the addendum, and finishing the manufacturing of the screen printing plate.

Images