Metal net and manufacturing method thereof

Abstract

The invention discloses a metal net and a manufacturing method thereof, the metal net is of a grid structure formed by closing a plurality of metal lines, the aperture ratio of the metal net is larger than or equal to 95%, the average area of each aperture of the metal net is smaller than 45 mm < 2 >, and the width of the metal lines larger than or equal to 50% in all the metal lines of the metal net is smaller than 0.05 mm; the manufacturing method of the metal net comprises the steps that firstly, a metal raw material is melted into metal melt in a melting device, the surface of a mold roller is coated with the metal melt in a blade coating mode, and concave forming grids on the surface of the mold roller are filled with the metal melt; secondly, under the action of a cooling roller, the metal melt filling the concave forming grids on the surface of the mold roller is cooled to form a metal net; and 3, stripping the formed metal net from the mold roller, and rolling to obtain the metal net coiled material. According to the invention, the metal net with small metal line width and large metal line number density can be conveniently manufactured.

Description

Technical Field

[0001] The invention relates to the field of metal meshes, in particular to a metal mesh and a manufacturing method thereof. Background Art

[0002] Existing metal meshes generally have a grid structure, and the metal mesh has multiple metal lines arranged in a cross pattern. The metal mesh has a variety of materials, and metal meshes made of different metal materials have different properties and can be used in different scenarios. For example, metal meshes made of steel can be used in the construction field for reinforcement or as fences; metal meshes made of nickel use nickel and can be used in printing or perforated film manufacturing and other fields; metal meshes made of copper or silver can be used on photovoltaic cells in the photovoltaic industry, and the crossed metal lines of the metal mesh can play the role of main grid lines and fine grid lines, realizing the convergence and output of current generated by photovoltaic cells.

[0003] When manufacturing the existing metal mesh, generally the metal wires are stretched and then fixed to form the metal mesh; if the width of the metal wires is smaller and the density of the number of metal wires is greater, the manufacturing difficulty is greater.

[0004] In view of the above problems, it is necessary to study a metal mesh and a manufacturing method thereof, which can conveniently manufacture a metal mesh with a small metal line width and a large metal line number density. Summary of the invention

[0005] The object of the present invention is to provide a metal mesh and a manufacturing method thereof, which can conveniently manufacture a metal mesh with a small metal line width and a large metal line number density.

[0006] In order to achieve the above object, the solution of the present invention is: A metal mesh having a mesh structure formed by a plurality of metal lines, the opening rate of the metal mesh is greater than or equal to 95%, and the average area of ​​each opening of the metal mesh is less than 45mm 2 , greater than or equal to 50% of all the metal lines of the metal mesh have a line width less than 0.05 mm.

[0007] The opening rate of the metal mesh is greater than or equal to 97%.

[0008] Among all the metal lines of the metal mesh, greater than or equal to 50% of the metal lines have a line width less than 0.02 mm.

[0009] The widths of the metal lines of the metal mesh are all the same or completely different or not exactly the same.

[0010] The multiple metal lines of the metal mesh include multiple first metal lines and multiple second metal lines that cross each other, the number density of the first metal lines is 5 to 15 lines / cm, the line width of the first metal lines is equal to or less than 0.035 mm, the number density of the second metal lines is 0.2 to 4 lines / cm, and the line width of the second metal lines is greater than 0.035 mm.

[0011] The plurality of metal lines of the metal mesh further include at least one third metal line, the line width of the third metal line is greater than the line width of the first metal line, and when the number of the third metal lines is greater than or equal to two, at least one first metal line is spaced between adjacent third metal lines.

[0012] When the number of the third metal lines is greater than or equal to two, the line widths of the third metal lines are the same, completely different, or not exactly the same.

[0013] The plurality of metal lines of the metal mesh further include frame metal lines with a line width greater than or equal to 0.2 mm, and the frame metal lines are fixedly connected to each of the first metal lines or each of the second metal lines.

[0014] A method for manufacturing the metal mesh as described above comprises the following steps in sequence: Step 1: Melt the metal raw material into a metal melt in a melting device, and scrape the metal melt onto the surface of the mold roller, so that the metal melt fills the concave forming grid on the surface of the mold roller, wherein: the forming grid is formed by a plurality of line forming grooves and the line forming grooves are interconnected, the opening rate of the forming grid is greater than or equal to 95%, and the average area of ​​each mesh of the forming grid is less than 45mm 2 , the width of more than or equal to 50% of all the line forming grooves of the forming grid is less than or equal to 0.5 mm; Step 2: Under the action of the cooling roller, the metal melt filling the recessed forming grid on the surface of the mold roller is cooled to form a metal mesh; Step 3: Peeling the formed metal mesh off the mold roller.

[0015] The multiple line forming grooves of the forming grid of the mold roller include multiple first line forming grooves and multiple second line forming grooves that intersect each other; the number density of the first line forming grooves is 5 to 15 lines / cm, and the width of the first line forming grooves is equal to or less than 0.035mm; the number density of the second line forming grooves is 0.2 to 4 lines / cm, and the line width of the second line forming grooves is greater than 0.035mm.

[0016] The multiple line forming grooves of the forming grid of the mold roller also include at least one third line forming groove, the width of the third line forming groove is greater than the width of the first line forming groove; and when the number of third line forming grooves is greater than or equal to two, at least one first line forming groove is spaced between adjacent third line forming grooves.

[0017] When the number of the third line forming grooves is greater than or equal to two, the widths of the third line forming grooves are the same, completely different, or not exactly the same.

[0018] The multiple line forming grooves of the forming grid of the mold roller also include frame line forming grooves with a width greater than or equal to 0.2 mm, and the frame line forming grooves are connected to each first line forming groove or each second line forming groove.

[0019] The metal raw material is made of silver, copper, aluminum, nickel or alloy metal.

[0020] Step 1 and step 2 are performed in a vacuum environment or a nitrogen protection environment.

[0021] In the step three, after the metal mesh is peeled off the mold roller, the metal mesh is rolled up to obtain a metal mesh coil.

[0022] In the step three, the formed metal mesh is firstly peeled off the mold roller, and then the metal mesh and the support layer are compounded, and finally they are rolled up together to obtain the metal mesh coil.

[0023] The support layer is a film or paper.

[0024] An adhesive layer is provided between the metal mesh and the supporting layer.

[0025] After adopting the above scheme, a metal mesh manufactured by a metal mesh manufacturing method of the present invention has a line width of greater than or equal to 50% of all the metal lines of the metal mesh less than 0.05 mm, and the opening rate of the metal mesh is greater than or equal to 95%, so that the metal mesh has a small shading area for photovoltaic cells; the metal lines of the metal mesh are relatively thin, and if the metal mesh is formed by traditionally stretching metal wires and then fixing the metal wires, the manufacturing process is complicated and difficult; the manufacturing method of the present invention can be realized by only designing a corresponding forming grid on a mold roller, and by adjusting the width and number density of each line forming groove of the forming grid of the mold roller, a metal mesh with different grid structures can be obtained; in addition, if metal meshes of different materials are to be obtained, only metal raw materials of different materials need to be used, which is flexible to operate and simple to manufacture; the metal mesh manufactured by the present invention can be used in the fields of decoration, filtration, protection, etc., especially in the photovoltaic field, as a main grid and fine grid on a photovoltaic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1Schematic diagram of a manufacturing device according to Embodiment 1 of the present invention.

[0027] Figure 2 This is a schematic diagram of manufacturing a metal mesh according to Embodiment 1 of the present invention.

[0028] Figure 3 This is a schematic diagram of a metal mesh according to Embodiment 1 of the present invention.

[0029] Figure 4 Schematic diagram of a manufacturing device according to Embodiment 2 of the present invention.

[0030] Figure 5 It is a schematic diagram of the metal mesh according to the second embodiment of the present invention.

[0031] Figure 6 Schematic diagram of a manufacturing device according to Embodiment 3 of the present invention.

[0032] Figure 7 This is a schematic diagram of manufacturing a metal mesh according to the third embodiment of the present invention.

[0033] Figure 8 This is a schematic diagram of a metal mesh according to Embodiment 3 of the present invention.

[0034] Fig. 9 Schematic diagram of a manufacturing device according to a fourth embodiment of the present invention.

[0035] Fig.10 This is a schematic diagram of a metal mesh according to a fourth embodiment of the present invention.

[0036] Description of labels: Manufacturing device 1, Melting device A, Mold roller B, forming grid B1, mesh B10, first line forming groove B11, second line forming groove B12, third line forming groove B13, frame line forming groove B14, Cooling roller C, Scraper D, Metal mesh coil 2, support layer 3, Metal mesh a, opening a0, first metal line a11, second metal line a12, third metal line a13, frame metal line a14. DETAILED DESCRIPTION

[0037] like Figures 1 to 10 As shown, the present invention discloses a metal mesh and a manufacturing method thereof, wherein the metal mesh a is a grid structure formed by closing a plurality of metal lines, the opening rate of the metal mesh a is greater than or equal to 95%, and the average area of ​​each opening a0 of the metal mesh is less than 45mm 2, the width of more than or equal to 50% of all the metal lines of the metal mesh a is less than 0.05mm; the manufacturing device 1 used in the manufacturing method includes a melting device A, a mold roller B and a cooling roller C; wherein a concave forming grid B1 is formed on the surface of the mold roller B, and the forming grid B1 is formed by a plurality of line forming grooves, and the line forming grooves are interconnected, and the line forming grooves are used to form the metal lines of the metal mesh a; the opening rate of the forming grid B1 is greater than or equal to 95%, and the average area of ​​each mesh B10 of the forming grid B1 is less than 45mm 2 , more than or equal to 50% of all the line forming grooves of the forming grid B1 have a width less than or equal to 0.5 mm; the multiple line forming grooves of the forming grid B1 include a plurality of first line forming grooves B11 and a plurality of second line forming grooves B12 that cross each other, the first line forming grooves B11 are used to form the first metal lines a11 of the metal mesh a, and the second line forming grooves B12 are used to form the second metal lines a12 of the metal mesh a; the number density of the first line forming grooves B11 is 5 to 15 lines / cm, and the width of the first line forming grooves B11 is equal to or less than 0.035 mm; the number density of the second line forming grooves B12 is 0.2 to 4 lines / cm, the line width of the second line forming grooves B12 is greater than 0.035 mm, and the width of the first line forming grooves B11 is less than the width of the second line forming grooves B12; and the melting device A is placed above the mold roller B, and the cooling roller C is adjacent to the mold roller B.

[0038] In the present invention, the cross-section of the metal line can be circular, elliptical, triangular or polygonal, and the shape is not limited; the widths of multiple metal lines are the same or completely different or not exactly the same. Correspondingly, each metal line forming grid a0 can be a polygon such as a quadrilateral, pentagon, hexagon, or can also form a circular or irregular shape. The number density of the line forming grooves refers to the number of line forming grooves per unit length, and the width of the line forming grooves refers to the maximum width of each line forming groove in the cross-sectional direction. The cross-section of the line forming grooves, the first line forming grooves B11 and the second line forming grooves B12 can be circular, elliptical, triangular or polygonal, and the shape is not limited. Multiple first line forming grooves B11 or multiple second line forming grooves B12 can be distributed parallel to each other, or they can be distributed crosswise with each other. The depth of the depression of each line forming groove of the forming grid B1 determines the thickness of the metal mesh a, which can be adjusted according to demand.

[0039] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0040] Embodiment 1: Cooperate Figures 1 to 3As shown, in the first embodiment of the present invention, the method for manufacturing the metal mesh of the present invention comprises the following steps in sequence: Step 1: Melt the metal raw material into metal melt in the melting device A, and apply the metal melt to the surface of the mold roller B through the scraper D, so that the metal melt fills the concave forming grid B1 on the surface of the mold roller B, and the forming grid B1 is formed by a plurality of line forming grooves, and the line forming grooves are interconnected; wherein the opening rate of the forming grid B1 is greater than or equal to 95%, and the average area of ​​each mesh B10 of the forming grid B1 is less than 45mm 2 , the width of more than or equal to 50% of all the line forming grooves of the forming grid B1 is less than 0.5 mm; Step 2: Under the action of the cooling roller C, the metal melt filling the forming grid B1 on the surface of the mold roller B is cooled to form a metal mesh a; Step 3: Peel the formed metal mesh a off the mold roller B, and roll it up to obtain a metal mesh coil 2.

[0041] In the first embodiment of the present invention, the metal melt forms metal lines in the line forming grooves by the above-mentioned method for manufacturing a metal mesh, and the metal lines are closed to form a metal mesh with a grid structure. Since the width of more than 50% of the line forming grooves in the forming grid B1 is less than 0.5 mm, the metal lines of the formed metal mesh a are relatively thin; by adjusting the width, combination mode and number density of each line forming groove of the forming grid B1 of the mold roller B, the metal mesh a with different grid structures can be obtained, and the grid structure of the formed metal mesh a can be a polygon such as a quadrilateral, pentagon, hexagon, or a circular or irregular shape; in addition, to obtain a metal mesh a of different materials, it is only necessary to add metal raw materials of different materials into the melting device A, and the metal can be silver, copper, aluminum, nickel or alloy metal, which is flexible to operate and simple to manufacture.

[0042] In the first embodiment of the present invention, step one and step two are performed in a vacuum environment or a nitrogen protection environment, which can effectively prevent the metal melt from being oxidized due to contact with air during the process of cooling to form the metal mesh a.

[0043] In the first embodiment of the present invention, the parameters of a metal mesh and a manufacturing method thereof of the present invention are as follows: the opening rate of the metal mesh a is 95%, and the average area of ​​each opening a0 of the metal mesh a is 40 mm 2 , the width of more than or equal to 50% of all the metal lines of the metal mesh a is 0.045 mm; the material of the metal raw material is copper.

[0044] Embodiment 2: Cooperate Figure 4 and Figure 5As shown, in the second embodiment of the present invention, the method for manufacturing the metal mesh of the present invention comprises the following steps in sequence: Step 1: Melt the metal raw material into metal melt in the melting device A, and apply the metal melt to the surface of the mold roller B through the scraper D, so that the metal melt fills the concave forming grid B1 on the surface of the mold roller B; wherein the opening rate of the forming grid B1 is greater than or equal to 95%, and the average area of ​​each mesh B10 of the forming grid B1 is less than 45mm 2 , the multiple line forming grooves of the forming grid B1 include multiple first line forming grooves B11 and multiple second line forming grooves B12 that cross each other; the number density of the first line forming grooves B11 is 5 to 15 lines / cm, and the width of the first line forming grooves B11 is equal to or less than 0.035 mm; the number density of the second line forming grooves B12 is 0.2 to 4 lines / cm, the line width of the second line forming grooves B12 is greater than 0.035 mm, and the width of the first line forming grooves B11 is less than the width of the second line forming grooves B12; Step 2: Under the action of the cooling roller C, the metal melt filling the forming grid B1 on the surface of the mold roller B is cooled to form a metal mesh a; Step 3: Peel the formed metal mesh a off the mold roller B, and roll it up to obtain a metal mesh coil 2.

[0045] In the second embodiment of the present invention, the metal mesh a obtained by the above-mentioned manufacturing method includes a plurality of first metal lines a11 and a plurality of second metal lines a12 that cross each other, the number density of the first metal lines a11 is 5 to 15 lines / cm, and the line width of the first metal lines a11 is equal to or less than 0.035 mm, the number density of the second metal lines a12 is 0.2 to 4 lines / cm, and the line width of the second metal lines a12 is greater than 0.035 mm; it should be noted that by adjusting the width and number density of each line forming groove of the forming grid B1 of the mold roller B, metal meshes a with different grid structures can be obtained; in addition, if metal meshes a of different materials are to be obtained, it is only necessary to add metal raw materials of different materials into the melting device A, and the metal may be silver, copper, aluminum, nickel or alloy metal, which is flexible to operate and simple to manufacture.

[0046] In the second embodiment of the present invention, step one and step two are performed in a vacuum environment or a nitrogen protection environment, which can effectively prevent the metal melt from being oxidized due to contact with air during the process of cooling to form the metal mesh a.

[0047] In the second embodiment of the present invention, the specific parameters of the manufacturing method of the metal mesh of the present invention can be: the opening rate of the metal mesh a is 97%, and the average area of ​​each opening a0 of the metal mesh a is 30 mm 2The number density of the first metal lines a11 of the metal mesh a is 5 lines / cm, the width of the first metal line a11 is 0.025mm, the number density of the second metal lines a12 is 4 lines / cm, and the width of the second metal line a12 of the metal mesh a is 0.04mm; the number density of the first line forming groove B11 of the mold roller B is 5 lines / cm, the width of the first line forming groove B11 is 0.025mm, the number density of the second line forming groove B12 is 4 lines / cm, and the width of the second line forming groove B12 is 0.04mm, and the material of the metal raw material is nickel.

[0048] Embodiment three: Cooperate Figures 5 to 8 As shown, in the third embodiment of the present invention, the method for manufacturing the metal mesh of the present invention comprises the following steps in sequence: Step 1: Melt the metal raw material into metal melt in the melting device A, and apply the metal melt to the surface of the mold roller B through the scraper D, so that the metal melt fills the concave forming grid B1 on the surface of the mold roller B; wherein the opening rate of the forming grid B1 is greater than or equal to 95%, and the average area of ​​each mesh B10 of the forming grid B1 is less than 45mm 2 , the forming grid B1 includes a plurality of first line forming grooves B11 and a plurality of second line forming grooves B12 that intersect each other, and the forming grid B1 also includes at least one third line forming groove B13, the width of the third line forming groove B13 is greater than the width of the first line forming groove B11; and when the number of the third line forming grooves B13 is greater than or equal to two, at least one first line forming groove B11 is spaced between adjacent third line forming grooves B13, and the widths of the third line forming grooves B13 are the same or completely different or not the same; Step 2: Under the action of the cooling roller C, the metal melt filling the forming grid B1 on the surface of the mold roller B is cooled to form a metal mesh a; Step 3: First, the formed metal mesh a is peeled off the mold roller B, and then the metal mesh a is compounded with the support layer 3, and then rolled up together to obtain the metal mesh coil 2.

[0049] In the third embodiment of the present invention, a third line forming groove B13 having a width greater than that of the first line forming groove B11 is further provided on the forming grid B1 of the mold roller B. Thus, the multiple metal lines of the metal mesh a formed in this way also include a third metal line a13. Since the third metal line a13 is relatively wide, the third metal line a13 can play a supporting role in the metal mesh a, thereby increasing the strength of the metal mesh a and effectively preventing the problem of metal line breakage in the metal mesh a during use.

[0050] In the third embodiment of the present invention, the presence of the support layer 3 in the metal mesh coil 2 can effectively isolate the metal mesh a, prevent the multiple layers of metal mesh a from sticking together, and facilitate the subsequent unwinding operation. The support layer 3 can be a film or paper, and there can be an adhesive layer between the metal mesh a and the support layer 3, so that the support layer 3 can adhere to the metal mesh a, effectively preventing the support layer 3 from moving during the winding process.

[0051] In the third embodiment of the present invention, step one and step two are performed in a vacuum environment or a nitrogen protection environment, which can effectively prevent the metal melt from being oxidized due to contact with air during the process of cooling to form the metal mesh a.

[0052] In the third embodiment of the present invention, the specific parameters in the manufacturing method of the metal mesh of the present invention can be: the opening rate of the metal mesh a is 96%, and the average area of ​​each opening a0 of the metal mesh a is 35mm 2 The number density of the first metal lines a11 of the metal mesh a is 10 lines / cm, the width of the first metal line a11 is 0.03mm, the number density of the second metal lines a12 of the metal mesh a is 2 lines / cm, the width of the second metal line a12 is 0.05mm, and the width of the third metal line a13 of the metal mesh a is 0.045mm; the number density of the first line forming groove B11 of the mold roller B is 10 lines / cm, the width of the first line forming groove B11 is 0.03mm, the number density of the second line forming groove B12 is 2 lines / cm, the width of the second line forming groove B12 is 0.05mm, and the width of the third line forming groove B13 is 0.045mm, and the material of the metal raw material is silver.

[0053] Embodiment 4: Cooperate Fig. 9 and Fig.10 As shown, in the fourth embodiment of the present invention, the method for manufacturing the metal mesh of the present invention comprises the following steps in sequence: Step 1: Melt the metal raw material into metal melt in the melting device A, and apply the metal melt to the surface of the mold roller B through the scraper D, so that the metal melt fills the concave forming grid B1 on the surface of the mold roller B; wherein the opening rate of the forming grid B1 is greater than or equal to 95%, and the average area of ​​each mesh B10 of the forming grid B1 is less than 45mm 2 The forming grid B1 includes a plurality of first line forming grooves B11 and a plurality of second line forming grooves B12 that intersect each other. The forming grid B1 also includes a frame line forming groove B14 with a width greater than or equal to 0.2 mm. The frame line forming groove B14 is connected to each of the first line forming grooves B11 and each of the second line forming grooves B12. Step 2: Under the action of the cooling roller C, the metal melt filling the forming grid B1 on the surface of the mold roller B is cooled to form a metal mesh a; Step 3: Peel the formed metal mesh a off the mold roller B, and roll it up to obtain the metal mesh coil 2.

[0054] In the fourth embodiment of the present invention, a frame line forming groove B14 with a width greater than or equal to 0.2 mm is further provided on the forming grid B1 of the mold roller B, so that the multiple metal lines of the metal mesh a formed in this way also include a metal frame metal line a14, and the frame metal line a14 is fixedly connected to each first metal line a11 or each second metal line a12, and the line width of the metal frame metal line a14 is greater than or equal to 0.2 mm; since the line width of the frame metal line a14 is relatively large, the frame metal line a14 can be cut as needed during application, and good strength can be provided to the metal mesh a, and damage to the metal lines of the metal mesh a can be effectively prevented when the mold roller B is peeled off, so that it is easy to demold.

[0055] In the fourth embodiment of the present invention, the specific parameters in the manufacturing method of the metal mesh of the present invention can be: the opening rate of the metal mesh a is 98%, and the average area of ​​each opening a0 of the metal mesh a is 25 mm 2 The number density of the first metal lines a11 of the metal mesh a is 15 lines / cm, the width of the first metal line a11 is 0.015mm, the number density of the second metal lines a12 of the metal mesh a is 0.2 lines / cm, the width of the second metal line a12 is 0.06mm, and the width of the border metal line a14 of the metal mesh a is 0.3mm; the number density of the first line forming groove B11 of the mold roller B is 15 lines / cm, the width of the first line forming groove B11 is 0.035mm, the number density of the second line forming groove B12 is 0.2 lines / cm, the width of the second line forming groove B12 is 0.06mm, the width of the border line forming groove B14 is 0.3mm, and the material of the metal raw material is nickel.

[0056] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A metal mesh, characterized in that: The metal mesh is a grid structure formed by multiple metal lines, the opening rate of the metal mesh is greater than or equal to 95%, and the average area of ​​each opening of the metal mesh is less than 45mm 2 , greater than or equal to 50% of all the metal lines of the metal mesh have a line width less than 0.05 mm.

2. The metal mesh according to claim 1, characterized in that: The opening rate of the metal mesh is greater than or equal to 97%.

3. The metal mesh according to claim 1, characterized in that: Among all the metal lines of the metal mesh, greater than or equal to 50% of the metal lines have a line width less than 0.02 mm.

4. The metal mesh according to claim 1, characterized in that: The widths of the metal lines of the metal mesh are all the same or completely different or not exactly the same.

5. The metal mesh according to claim 1, characterized in that: The multiple metal lines of the metal mesh include multiple first metal lines and multiple second metal lines that cross each other, the number density of the first metal lines is 5 to 15 lines / cm, the line width of the first metal lines is equal to or less than 0.035 mm, the number density of the second metal lines is 0.2 to 4 lines / cm, and the line width of the second metal lines is greater than 0.035 mm.

6. The metal mesh according to claim 5, characterized in that: The plurality of metal lines of the metal mesh further include at least one third metal line, the line width of the third metal line is greater than the line width of the first metal line, and when the number of the third metal lines is greater than or equal to two, at least one first metal line is spaced between adjacent third metal lines.

7. The metal mesh according to claim 6, characterized in that: When the number of the third metal lines is greater than or equal to two, the line widths of the third metal lines are the same, completely different, or not exactly the same.

8. The metal mesh according to claim 5, characterized in that: The plurality of metal lines of the metal mesh further include frame metal lines with a line width greater than or equal to 0.2 mm, and the frame metal lines are fixedly connected to each of the first metal lines or each of the second metal lines.

9. A method for manufacturing a metal mesh as claimed in claim 1, characterized in that: The steps are as follows: Step 1: Melt the metal raw material into a metal melt in a melting device, and scrape the metal melt onto the surface of the mold roller, so that the metal melt fills the concave forming grid on the surface of the mold roller, wherein: the forming grid is formed by a plurality of line forming grooves and the line forming grooves are interconnected, the opening rate of the forming grid is greater than or equal to 95%, and the average area of ​​each mesh of the forming grid is less than 45mm 2 , the width of more than or equal to 50% of all the line forming grooves of the forming grid is less than or equal to 0.5 mm; Step 2: Under the action of the cooling roller, the metal melt filling the recessed forming grid on the surface of the mold roller is cooled to form a metal mesh; Step 3: Peeling the formed metal mesh off the mold roller.

10. The manufacturing method according to claim 9, characterized in that: The multiple line forming grooves of the forming grid of the mold roller include multiple first line forming grooves and multiple second line forming grooves that intersect each other; the number density of the first line forming grooves is 5 to 15 lines / cm, and the width of the first line forming grooves is equal to or less than 0.035mm; the number density of the second line forming grooves is 0.2 to 4 lines / cm, and the line width of the second line forming grooves is greater than 0.035mm.

11. The manufacturing method according to claim 10, characterized in that: The multiple line forming grooves of the forming grid of the mold roller also include at least one third line forming groove, the width of the third line forming groove is greater than the width of the first line forming groove; and when the number of third line forming grooves is greater than or equal to two, at least one first line forming groove is spaced between adjacent third line forming grooves.

12. The manufacturing method according to claim 11, characterized in that: When the number of the third line forming grooves is greater than or equal to two, the widths of the third line forming grooves are the same, completely different, or not exactly the same.

13. The manufacturing method according to claim 10, characterized in that: The multiple line forming grooves of the forming grid of the mold roller also include frame line forming grooves with a width greater than or equal to 0.2 mm, and the frame line forming grooves are connected to each first line forming groove or each second line forming groove.

14. The manufacturing method according to claim 9, characterized in that: The metal raw material is made of silver, copper, aluminum, nickel or alloy metal.

15. The manufacturing method according to claim 9, characterized in that: Step 1 and step 2 are performed in a vacuum environment or a nitrogen protection environment.

16. The manufacturing method according to claim 9, characterized in that: In the step three, after the metal mesh is peeled off the mold roller, the metal mesh is rolled up to obtain a metal mesh coil.

17. The manufacturing method according to claim 16, characterized in that: In the step three, the formed metal mesh is firstly peeled off the mold roller, and then the metal mesh and the support layer are compounded, and finally they are rolled up together to obtain the metal mesh coil.

18. The manufacturing method according to claim 17, characterized in that: The support layer is a film or paper.

19. The manufacturing method according to claim 17, characterized in that: An adhesive layer is provided between the metal mesh and the supporting layer.

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