CN113085347A - Screen printing double-layer screen stretching method - Google Patents
Screen printing double-layer screen stretching method Download PDFInfo
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- CN113085347A CN113085347A CN202110280772.5A CN202110280772A CN113085347A CN 113085347 A CN113085347 A CN 113085347A CN 202110280772 A CN202110280772 A CN 202110280772A CN 113085347 A CN113085347 A CN 113085347A
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- mesh
- screen printing
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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
- B41C1/14—Forme preparation for stencil-printing or silk-screen printing
Abstract
The invention provides a screen printing double-layer screen stretching method, which relates to the technical field of packaging printing and comprises the following steps of S1: welding and pressing the steel mesh on the mesh frame; s2: stretching the gauze on the screen frame welded with the steel mesh; s3: a CCD camera is used for shooting the shape of the meshes after the double-layer stretching; s4: the overlapping angle and position of the gauze and the steel mesh are adjusted according to the shot image, so that the shape of the meshes meets the preset requirement. The invention can adjust the shape and size of the mesh at will by matching different shapes, mesh numbers and overlapping angles in the two layers of stretching nets, thereby realizing the printing effect different from the traditional screen printing. And the special mesh-shaped printed graph and text has a certain anti-counterfeiting function. Through configuration different steel mesh and the gauze of thickness, can change the mesh degree of depth for the printing picture and text is concave and convex to be had, has certain relief effect, demonstrates more exquisite picture and text.
Description
Technical Field
The invention relates to the technical field of packaging printing, in particular to a screen printing double-layer screen stretching method.
Background
The screen printing process is that the printing ink leaks to the surface of the printing stock through the meshes of the image-text part on the screen, and the printing ink dots leaked from each mesh form an image. However, with the requirements of individuation, beautification and anti-counterfeiting effect of product packaging, the requirements on the screen printing effect are more and more variable, and the graphic effect formed by different mesh point shapes is an important aspect of the screen printing effect.
Currently, the most widely used dot shapes include circular dot, square dot, diamond dot, oval dot, and the like. The traditional silk-screen printing method usually adopts different point shapes to make a plate respectively, the plate making needs to be carried out again each time the shape of the mesh point is changed, the silk screen with meshes in special shapes is high in cost, and some shapes can not be achieved even due to the limitation of the silk screen weaving technology.
Disclosure of Invention
The invention aims to provide a double-layer screen stretching method for screen printing, and aims to solve the problem that the mesh shape of a screen plate is single and cannot meet diversified requirements in the screen printing.
The technical scheme of the invention is as follows: a screen printing double-layer stretching method comprises the following steps:
s1: welding and pressing the steel mesh on the mesh frame;
s2: stretching the gauze on the screen frame welded with the steel mesh;
s3: a CCD camera is used for shooting the shape of the meshes after the double-layer stretching;
s4: the overlapping angle and position of the gauze and the steel mesh are adjusted according to the shot image, so that the shape of the meshes meets the preset requirement.
Preferably, the mesh frame is a metal mesh frame adapted to a welding and pressing process.
Preferably, the mesh shape of the steel mesh is one of basic mesh shapes such as round mesh, square mesh, diamond mesh or oval mesh.
Preferably, the mesh number of the steel mesh is 20-200 mesh.
Preferably, the steel net is a metal steel net with certain elasticity and flexibility.
Preferably, the welding surface of the steel mesh and the mesh frame after welding and pressing is smooth and even.
Preferably, the screen mesh shape is one of basic mesh shapes such as a round mesh, a square mesh, a diamond mesh, or an oval mesh.
Preferably, the mesh number of the gauze is 20-400 meshes.
Preferably, the gauze is stretched on the screen frame welded with the steel mesh by using a screen stretching device capable of adjusting screen stretching tension and screen stretching angle.
Preferably, the CCD camera is arranged right above the screen frame vertically.
Preferably, the steel mesh and the gauze having different thicknesses may be selected within a certain range.
The invention has the following advantages:
1. the invention can adjust the shape and size of the mesh at will by matching different shapes, mesh numbers and overlapping angles in the two layers of stretching nets, thereby realizing the printing effect different from the traditional screen printing.
2. The special mesh-shaped printed graph and text in the invention has certain anti-counterfeiting effect.
3. According to the invention, by selecting the steel mesh and the gauze with different thicknesses, the mesh depth can be changed, so that the printed pictures and texts are concave and convex, have a certain embossment effect, and present more exquisite pictures and texts.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view showing the mesh shape of a double-layer net in example 1;
FIG. 2 is a schematic view showing the mesh shape of the double-layer stretching net in example 2;
FIG. 3 is a schematic view showing the mesh shape of the double-layer stretching net in example 3;
FIG. 4 is a schematic view showing the mesh shape of the double-layer net in example 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar language in the embodiments of the present invention does not denote any order, quantity, or importance, but rather the terms "first," "second," and similar language are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "Upper," "lower," "left," "right," "lateral," "vertical," and the like are used solely in relation to the orientation of the components in the figures, and these directional terms are relative terms that are used for descriptive and clarity purposes and that can vary accordingly depending on the orientation in which the components in the figures are placed.
Example 1:
a screen printing double-layer stretching method comprises the following steps:
s1: welding and pressing a 50-mesh square mesh steel net on the net frame;
s2: the 50-mesh circular mesh gauze is stretched on a net frame welded with a steel net;
s3: a CCD camera is used for shooting the shape of the meshes after the double-layer stretching;
s4: and adjusting the angle and the position of the gauze and the steel mesh according to the captured image to enable the overlapping angle to be 0 degree, and enabling the position to be shifted by half the distance along the horizontal direction to enable the shape of the mesh to meet the preset requirement.
Example 2:
a screen printing double-layer stretching method comprises the following steps:
s1: welding and pressing a 50-mesh diamond mesh steel net on the net frame;
s2: the gauze with 100 meshes and circular meshes is stretched on a net frame welded with a steel net;
s3: a CCD camera is used for shooting the shape of the meshes after the double-layer stretching;
s4: and adjusting the angle and the position of the gauze and the steel mesh according to the captured image to ensure that the overlapping angle is 45 degrees, and the positions are respectively offset by half-mesh distance along the horizontal direction and the vertical direction to ensure that the shape of the meshes meets the preset requirement.
Example 3:
a screen printing double-layer stretching method comprises the following steps:
s1: welding and pressing a 100-mesh square mesh steel net on the net frame;
s2: the gauze with 100 meshes and circular meshes is stretched on a net frame welded with a steel net;
s3: a CCD camera is used for shooting the shape of the meshes after the double-layer stretching;
s4: the angle and the position of the gauze and the steel mesh are adjusted according to the shot image, so that the overlapping angle is 0 degree, the position is not shifted or shifted by an integral distance along the horizontal direction and the vertical direction, and the shape of the mesh meets the preset requirement.
Example 4:
a screen printing double-layer stretching method comprises the following steps:
s1: welding and pressing a 100-mesh square mesh steel net on the net frame;
s2: a 100-mesh square mesh gauze is stretched on a net frame welded with a steel net;
s3: a CCD camera is used for shooting the shape of the meshes after the double-layer stretching;
s4: and adjusting the angle and the position of the gauze and the steel mesh according to the captured image to enable the overlapping angle to be 60 degrees, and enabling the position not to be shifted or shifted by an integral number of distances along the horizontal direction and the vertical direction to enable the shape of the mesh to meet the preset requirement.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A screen printing double-layer stretching method is characterized by comprising the following steps:
s1: welding and pressing the steel mesh on the mesh frame;
s2: stretching the gauze on the screen frame welded with the steel mesh;
s3: a CCD camera is used for shooting the shape of the meshes after the double-layer stretching;
s4: the overlapping angle and position of the gauze and the steel mesh are adjusted according to the shot image, so that the shape of the meshes meets the preset requirement.
2. A screen printing double-layer screen printing method according to claim 1, wherein: the screen frame is a metal screen frame suitable for a welding and pressing process.
3. A screen printing double-layer screen printing method according to claim 1, wherein: the mesh shape of the steel mesh is one of the basic mesh shapes of round meshes, square meshes, rhombic meshes or oval meshes.
4. A screen printing double-layer screen printing method according to claim 1, wherein: the mesh number of the steel mesh is 20-200 meshes.
5. A screen printing double-layer screen printing method according to claim 1, wherein: the steel mesh is a metal steel mesh with certain elasticity and flexibility.
6. A screen printing double-layer screen printing method according to claim 1, wherein: the welding surface of the steel mesh and the mesh frame is smooth after welding and pressing.
7. A screen printing double-layer screen printing method according to claim 1, wherein: the shape of the gauze mesh is one of the basic mesh shapes of round mesh, square mesh, diamond mesh or oval mesh.
8. A screen printing double-layer screen printing method according to claim 1, wherein: the mesh number of the gauze is 20-400 meshes.
9. A screen printing double-layer screen printing method according to claim 1, wherein: and (3) using a screen stretching device capable of adjusting the screen stretching tension and the screen stretching angle to stretch the gauze on the screen frame welded with the steel mesh.
10. A screen printing double-layer screen printing method according to claim 1, wherein: the CCD camera is arranged right above the screen frame.
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