A multi-variety thread-thickened screen and a preparation process thereof

Abstract

The application discloses a multi-thickness screen printing plate, comprising a screen frame, a metal screen inside the screen frame, a shielding film on the surface of the metal screen, a printing pattern on the shielding film, a groove on the metal screen, and the printing pattern being arranged in the groove. The application also discloses a preparation process of the multi-thickness screen printing plate, comprising the following steps: S1. cutting the metal screen into a required size and angle; S2. making a concave-convex rolling pad according to the requirement of the printing thickness of different areas of the printing pattern; S3. placing the concave-convex rolling pad on the metal screen, and pressing the metal screen by a hydraulic device to realize the differential thickness of different areas of the metal screen; and S4. combining the metal screen with a side screen according to an existing process, and then stretching the screen to a required screen frame, cleaning, and preparing a shielding film layer and a printing pattern. The screen printing plate can realize the printing of the differential thickness requirement of multiple areas of a printing object on the same printing screen, and does not damage the original structure of the metal screen, and the batch production difficulty is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing screen, more particularly, it relates to a multi-thickness screen and a preparation process thereof. BACKGROUND

[0002] The conventional printing screen is mainly composed of a screen frame, a screen mesh and a shielding film layer. The printing pattern is prepared on the shielding film layer by exposure and development or is engraved by laser. The thickness of the printing pattern printed on the printing material is mainly determined by the thickness of the screen mesh, the width of the pattern and the thickness of the shielding film layer. In actual printing screen application, when the printing thickness of different positions on the same printing screen has different requirements, the thickness of the screen mesh is determined by large-scale rolling equipment after weaving. Once the initial thickness of the screen is determined, it cannot be changed. The requirements can only be met by auxiliary plate-making technology. The current technical means mainly includes the following ways.

[0003] 1. Different printing pattern widths are designed for different areas. This method is simple to implement, but the printing width of the area with high printing thickness is also large, and the height difference is limited.

[0004] 2. Different thicknesses of the shielding film layer are prepared for different positions on the same template. The process is relatively complex. It is difficult to achieve seamless joint and alignment between different thicknesses. When there are more than two thickness differences on the same printing screen, and the thickness difference area is irregular, it is almost impossible.

[0005] 3. A laser cutting process is used on the metal screen mesh to remove part of the screen mesh in the corresponding area as needed to increase the ink permeability. The disadvantage is that it will reduce the strength of the metal screen mesh. The more the difference areas, the greater the loss of the strength of the metal screen mesh.

[0006] 4. The woven screen is abandoned, and the electroformed screen is used to realize the design of different mesh counts and wire diameters of the electroformed screen in different areas on the same printing screen to realize different ink permeability. SUMMARY

[0007] The present application aims to overcome the shortcomings of the prior art and provide a multi-thickness screen and a preparation process thereof.

[0008] To solve the above technical problems, the purpose of the present application is achieved as follows: the multi-thickness screen comprises a screen frame, a metal screen mesh with a shielding film on the surface in the screen frame, a border screen connected between the metal screen mesh and the screen frame, a printing pattern on the shielding film, a groove on the metal screen mesh for reducing the thickness and forming a different thickness area, and the printing pattern is partially arranged in the groove.

[0009] The present application is further provided as follows: the grooves can be continuously distributed on the metal screen mesh.

[0010] The application is further provided that the grooves are distributed on the metal screen in a discontinuous manner.

[0011] The application is further provided that the depth of the grooves is determined by the height of the pad used for rolling, the rolling pressure and the time.

[0012] The application also relates to a preparation process of a diversity-thickness screen, comprising the following steps:

[0013] S1. Cutting the metal screen into the required size and angle according to the requirements; the metal screen can be one of a woven screen, an electroformed screen and an etched screen, and the metal screen can be initially rolled or not rolled according to the actual requirements;

[0014] S2. Determining the size, shape and quantity of the corresponding area of the metal screen according to the printing thickness requirements of different areas of the printing pattern, and then manufacturing the concave-convex rolling pad according to the size, shape and quantity of the required area;

[0015] S3. Placing the metal screen on the hydraulic equipment, and then placing the concave-convex rolling pad on the metal screen, and then rolling the metal screen by the hydraulic equipment to realize the differential thickness of different areas of the metal screen; the thickness of different areas can be realized by the height of the convex of the concave-convex pad, the rolling pressure and the time parameters;

[0016] S4. Compounding the metal screen with the differential thickness area after rolling with the existing process and the edge screen, and then stretching the screen to the required screen frame, and then preparing the shielding film layer and the printing pattern after cleaning, and the specific method is as follows:

[0017] Method one, coating a photosensitive emulsion on the metal screen, and preparing a printing pattern by exposure and development; when the film thickness of the dried photosensitive emulsion needs to be leveled with the ups and downs of the thickness of the metal screen, the photosensitive emulsion can be pasted with water film, and the emulsion is downward during baking to realize a more level emulsion film thickness; or

[0018] Method two, pasting a high polymer film on the metal screen, and preparing a printing pattern by laser engraving; when the high polymer film is pasted on the metal screen and is not changed with the ups and downs of the thickness of the metal screen, the high polymer film can be adsorbed on the metal screen to realize the pasting in a vacuum environment.

[0019] The application is further provided that in step S2, the rolling pad is processed and manufactured from high-strength tungsten steel and chromium steel.

[0020] The application is further provided that in step S3, the rolling method can adopt one-way rolling of one concave-convex pad, or two pads to place the metal screen in the middle for two-way rolling.

[0021] The application is further configured that in step S4, the photosensitive emulsion can be a positive / negative photosensitive glue or photoresist.

[0022] The application is further configured that in step S4, the high polymer shielding film can be a P1, PA, PET, LCP high polymer material film.

[0023] In summary, the application has the following beneficial effects: the diversity thick screen printing plate and the preparation process thereof can realize the printing of different thicknesses of multiple areas on the printing object with the same printing screen plate, does not damage the original structure of the metal screen, has low batch production difficulty, perfect overall function, and strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the application;

[0025] Figure 2 is a schematic diagram of the cross-sectional structure of the application. DETAILED DESCRIPTION

[0026] In order for those skilled in the art to better understand the technical solutions of the present application, the preferred embodiments of the present application will be described below in combination with specific examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present application, and are not a limitation on the patent claims of the present application. Based on the examples in the present application, all other examples obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] The present application will be further illustrated below in combination with the drawings and preferred embodiments.

[0028] Example 1

[0029] Referring to Figure 1 and Figure 2 , the diversity thick screen printing plate of the present embodiment includes a screen frame 1, a metal screen gauze 2 with a shielding film on the surface is arranged in the screen frame 1, a side gauze 3 is connected between the metal screen gauze 2 and the screen frame 1, a printing pattern 4 is arranged on the shielding film, a groove 6 is pressed on the metal screen gauze 2 to reduce the thickness and form a differentiated thick area 5, and the printing pattern 4 is partially arranged in the groove 6.

[0030] Further, the grooves 6 can be distributed on the metal screen gauze 2 in a continuous manner, or in a non-continuous manner.

[0031] Further, the depth of the groove 6 is determined by the height of the pad used for rolling, the rolling pressure and time.

[0032] A preparation process of a diversity thread thickness screen plate, comprising the following steps:

[0033] S1. Cutting the metal mesh screen into the required size and angle according to the requirements; the metal mesh screen can be one of a woven mesh screen, an electroformed mesh screen, and an etched mesh screen, and the metal mesh screen can be initially rolled or not rolled according to the actual requirements;

[0034] S2. Determining the size, shape, and number of the corresponding areas of the metal mesh screen according to the printing thickness requirements of different areas of the printing pattern; and then making a concave-convex rolling pad according to the size, shape, and number of the required areas;

[0035] S3. Placing the metal mesh screen on a hydraulic device, and then placing the concave-convex rolling pad on the metal mesh screen, and applying pressure to the metal mesh screen by the hydraulic device to realize the differential thread thickness of different areas on the metal mesh screen; the thread thickness of different areas can be realized by designing the height of the convex part of the concave-convex pad, the rolling pressure, and the time parameters;

[0036] S4. After rolling, the metal mesh screen with differential thread thickness areas is compounded with the existing process and the edge screen to be stretched to the required screen frame, and after cleaning, a shielding film layer and a printing pattern are prepared, and the specific method is as follows:

[0037] Method one, coating a photosensitive emulsion on the metal mesh screen, and using exposure and development to prepare a printing pattern; when the film thickness of the dried photosensitive emulsion needs to be leveled with the ups and downs of the metal mesh screen thickness, the photosensitive emulsion can be pasted with water film, and the emulsion is downward during baking to realize a more level emulsion film thickness; or

[0038] Method two, pasting a high polymer film on the metal mesh screen, and using laser engraving to prepare a printing pattern. When the high polymer film is pasted on the metal mesh screen and is not changed with the ups and downs of the metal mesh screen thickness, the high polymer film can be adsorbed on the metal mesh screen in a vacuum environment to realize the pasting.

[0039] Further, in step S2, the rolling pad is made of high-strength tungsten steel and chromium steel.

[0040] Further, in step S3, the rolling method can use a one-way rolling of a concave-convex pad, or a two-way rolling of two pads with the metal mesh screen placed in the middle.

[0041] Further, in step S4, the photosensitive emulsion can be a positive / negative photosensitive glue or a photoresist.

[0042] Further, in step S4, the high polymer shielding film can be a P1, PA, PET, LCP, or other high polymer material film.

[0043] In the present embodiment, in order to meet the requirement of printing different thicknesses in different positions on the same printing screen, the present application provides a multi-thickness screen and a preparation process thereof, which comprises a screen frame, a border thread, a metal screen, a shielding film layer and a printing pattern. The metal screen has two or more than two yarn thickness areas of any shape and size, so as to meet the requirement of different printing thicknesses in different yarn thickness areas.

[0044] The different yarn thicknesses in different areas can also be realized by first compounding the metal screen, then stretching the screen to the required screen frame and then rolling, and the rolling method can be realized by using air pressure or mechanical pressure equipment in addition to hydraulic pressure.

[0045] In addition to being compounded and bonded to the printing screen frame with the border thread, the metal screen for realizing the different yarn thickness areas can also be directly bonded to the printing screen frame according to requirements.

[0046] The multi-thickness screen and the preparation process thereof according to the present application can realize the printing of different thicknesses in different areas on the same printing screen, and the original structure of the metal screen is not damaged, the batch production is difficult, the overall function is perfect, and the practicability is strong.

[0047] In the present application, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating the orientation or positional relationship, they are based on the actual shown orientation or positional relationship, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the orientation or positional relationship in the present application are only used for example, and cannot be understood as a limitation of the present patent, and for those skilled in the art, the specific meaning of the above terms can be understood in combination with the embodiments and according to the specific circumstances.

[0048] Unless otherwise explicitly specified and limited, in the present application, if there are terms such as "setting", "connecting" and "connecting", they should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected, they can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The preferred embodiments of the present application have been described above in detail. It should be understood that modifications and variations to the preferred embodiments could be made by those skilled in the art in light of the teachings above. It is therefore contemplated that the application can encompass other variations and modifications that fall within the scope of the claims.

Claims

1. A process for the preparation of a multi-variety, thick-wire screen, characterized in that, It comprises the following steps: S1. Cutting the metal mesh into the required size and angle according to the requirements; the metal mesh is one of woven mesh, electroformed mesh and etched mesh, and the metal mesh is initially rolled or not rolled according to the actual requirements; S2. According to the requirements of the printing thickness of different areas of the printing pattern, determine the size, shape and number of the corresponding areas of the metal mesh; then make the concave-convex rolling pad according to the size, shape and number of the required area; S3. Place the metal mesh on the hydraulic equipment, then place the concave-convex rolling pad on the metal mesh, and press the metal mesh by the hydraulic equipment to realize the differential thickness of different areas of the metal mesh; the thickness of different areas is realized by the height of the convex of the concave-convex pad, the rolling pressure and time parameter design; S4. After rolling, the metal mesh with differential thickness area is compounded with the existing process and the edge mesh, and then it is stretched to the required mesh frame, and after cleaning, the shielding film layer and the printing pattern are prepared, the specific method is as follows: Method one, coating photosensitive emulsion on the metal mesh, and using exposure and development to prepare the printing pattern; when the film thickness of the dried photosensitive emulsion changes with the ups and downs of the metal mesh thickness and needs to be flattened, the photosensitive emulsion uses the method of sticking water film, and the emulsion is downward during baking, to realize more flat emulsion film thickness; or Method two, sticking high molecular film on the metal mesh, and using laser to prepare the printing pattern; when the high molecular film is not affected by the ups and downs of the metal mesh thickness when it is stuck on the metal mesh, the high molecular film is adsorbed on the metal mesh in a vacuum environment to realize the sticking.

2. The process for preparing a variable thread thickness screen according to claim 1, characterized in that, In step S2, the rolling pad is made of high-strength tungsten steel and chromium steel.

3. The process for preparing a variable thread thickness screen according to claim 1, characterized in that, In step S3, the rolling method uses a concave-convex pad for one-way rolling, or two pads are used to place the metal mesh in the middle for two-way rolling.

4. The process for preparing a variable thread thickness screen according to claim 1, characterized in that, In step S4, the photosensitive emulsion is positive / negative photosensitive glue.

5. The process for preparing a variable thread thickness screen according to claim 1, wherein, In step S4, the shielding film layer is a P1, PA, PET or LCP high molecular material film.

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