A printing screen

Abstract

The present invention relates to the technical field of capacitors, and discloses a printing screen, which comprises: a mesh body; the mesh body is divided into a target product area and an auxiliary area; an auxiliary graphic is printed on the auxiliary area; a first edge is provided with a first angle portion convex outwardly; a third edge is provided with a second angle portion concave inwardly and matched with the first angle portion; a second edge is provided with a third angle portion convex outwardly; and a fourth edge is provided with a fourth angle portion concave inwardly and matched with the third angle portion. The present invention makes a plurality of auxiliary graphics arcs in the first straight line direction interlock with each other, and the gap between two adjacent auxiliary graphics in the first straight line direction is a plurality of broken lines, so as to avoid the situation in the past where the gap between the auxiliary graphics is a straight line, resulting in the inability of the cross section to display the ferrous metal material, so that the cutting machine can always cut on the auxiliary graphics, thereby improving the automatic recognition rate and production efficiency of the product on the assembly line machine.

Description

Technical Field

[0001] The invention relates to the technical field of capacitors, in particular to a printing screen. Background Art

[0002] At present, in order to adapt to the trend of increasing raw materials and production costs of electronic components and continuous shrinking of profit margins, it is necessary to accurately control the input and output of each link in the entire production process and improve the qualified rate of products at each stage to maximize profits. Therefore, in the production and manufacturing process of capacitors, it is necessary to improve the qualified rate of casting, screen printing, lamination, cutting and subsequent processes, and at the same time, there are higher requirements for the accuracy of equipment and the proficiency of employees.

[0003] Chip ceramic capacitors include multilayer ceramic mesh, inner electrode and outer electrode. The inner electrode is formed by printing metal paste on the ceramic mesh by screen printing. The printed screen is peeled off and stacked together at a certain distance. Then, a bottom protective layer (ceramic material) and a surface protective layer (ceramic material) are added. All the printed screens, bottom protective layers and surface protective layers are compacted by lamination. Finally, several capacitor chips are cut out by a certain cutting method. The chip is sintered at high temperature to form the main part of the ceramic capacitor. Then, the outer electrodes are sealed at both ends of the capacitor and connected to the inner electrodes to produce a chip ceramic capacitor.

[0004] like Figure 1 and 2 As shown, and referring to the patent document with publication number CN104191806B, in the traditional production process, the size of the ceramic mesh is consistent with the flat rectangular suction cup of the laminator. When the rectangular suction cup of the laminator is working, the vacuum adsorption force of the edge area is greater than that of the central area. In order to avoid affecting the product qualification rate, the edge area does not make products (internal electrode patterns), and only prints some auxiliary patterns. Therefore, the printing screen is divided into the target product area and the auxiliary area. Due to the limitations of factors such as the precision of the machine equipment for making the printing screen, the wire material of the screen, the latex material, and the stacking height of the mesh, the auxiliary graphics in the auxiliary area of ​​the traditional ceramic mesh are generally designed as straight edge rectangles, and there is a certain gap between adjacent straight edge rectangles. The color of the ceramic mesh material is lighter, close to white. The color of the metal electrode slurry is darker, close to black. Therefore, the color of the internal electrode pattern and the auxiliary pattern is generally black. Through staggered lamination, several layers of ceramic mesh are stacked together, and after lamination, all the meshes are compacted to form a block. In the cutting process, in order to load multiple blocks into the cutting machine for automatic continuous cutting, a portion of the block material must first be vertically cut off on each of the four sides of the auxiliary area. The size of the cut is approximately half the length and width of the traditional auxiliary pattern, so that the ferrous metal material of the auxiliary pattern can be identified from the cut surface, and the cutting machine can accurately identify the specific position of the block from the cut surface and start automatic continuous cutting.

[0005] Since the operation of vertically cutting off a part of the block material on each of the four sides of the auxiliary area is done manually, there is a certain error in the cutting accuracy. For traditional straight-edge rectangular auxiliary graphics, there is a straight gap between adjacent auxiliary graphics. When the cutting machine cuts along the straight line on the gap, there is a situation where the cutting line position overlaps with the gap between adjacent straight-edge rectangles, resulting in the section showing only white ceramic mesh material and unable to show the black metal material layer. Ultimately, the cutting machine cannot correctly identify the block position and an error alarm is issued, and then it is necessary to manually check whether the printed screen has been cut, resulting in the inability to complete automated cutting, affecting production efficiency. Summary of the invention

[0006] The technical problem to be solved by the present invention is: how to avoid the situation that when the cutting machine cuts along a straight line on the gap, the cutting line overlaps with the adjacent auxiliary pattern gap, resulting in the inability to display the ferrous metal material on the cut surface.

[0007] In order to solve the above technical problems, the present invention provides a printing screen, which comprises: a screen body; the screen body is divided into a target product area and an auxiliary area; the auxiliary area is printed with an auxiliary pattern; the target product area is printed with a plurality of inner electrode patterns;

[0008] The auxiliary pattern has a first edge, a second edge, a third edge opposite to the first edge, and a fourth edge opposite to the second edge;

[0009] The first edge is provided with a first angled portion convex outward; the third edge is provided with a second angled portion concave inward and matched with the first angled portion;

[0010] The second edge is provided with a third angled portion convex outward; the fourth edge is provided with a fourth angled portion concave inward and matched with the third angled portion;

[0011] There are multiple auxiliary graphics; wherein, in the first straight line direction, the first corner portion of one of two adjacent auxiliary graphics among the multiple auxiliary graphics is interlocked with the second corner portion of the other auxiliary graphic; in the second straight line direction, the third corner portion of one of two adjacent auxiliary graphics among the multiple auxiliary graphics is interlocked with the fourth corner portion of the other auxiliary graphic; the first straight line direction is set at an angle to the second straight line direction.

[0012] Optionally, the first straight line direction is perpendicular to the second straight line direction.

[0013] Optionally, the first edge is provided with a fifth angle portion that is concave inwards; the third edge is provided with a sixth angle portion that is convex outwards and matches the fifth angle portion; in the first straight line direction, the first angle portion and the fifth angle portion are provided in sequence, and the second angle portion and the sixth angle portion are provided in sequence;

[0014] The second edge is provided with a seventh angle portion which is recessed inwardly; the fourth edge is provided with an eighth angle portion which is protruding outwardly and matched with the seventh angle portion; in the first straight line direction, the third angle portion and the seventh angle portion are arranged in sequence, and the fourth angle portion and the eighth angle portion are arranged in sequence.

[0015] Optionally, the first edge includes: a first straight edge, a second straight edge, and a third straight edge; the second end of the first straight edge is connected to the first end of the second straight edge, and the second end of the second straight edge is connected to the first end of the third straight edge; a first angled portion is formed at the connection between the first straight edge and the second straight edge; a fifth angled portion is formed at the connection between the second straight edge and the third straight edge;

[0016] The third edge includes: a fourth straight edge, a fifth straight edge, and a sixth straight edge; the second end of the fourth straight edge is connected to the first end of the fifth straight edge, and the second end of the fifth straight edge is connected to the first end of the sixth straight edge; the connection between the fourth straight edge and the fifth straight edge forms a second angle portion; the connection between the fifth straight edge and the sixth straight edge forms a sixth angle portion.

[0017] Optionally, the first straight edge is arranged in parallel with the fourth straight edge; the second straight edge is arranged in parallel with the fifth straight edge; and the third straight edge is arranged in parallel with the sixth straight edge.

[0018] Optionally, the extension straight line direction of the first straight edge, the extension straight line direction of the second straight edge, the extension straight line direction of the third straight edge, the extension straight line direction of the fourth straight edge, the extension straight line direction of the fifth straight edge, and the extension straight line direction of the sixth straight edge are respectively set at an angle to the first straight line direction and the second straight line direction.

[0019] Optionally, the second edge includes: a seventh straight edge, an eighth straight edge, and a ninth straight edge; the second end of the seventh straight edge is connected to the first end of the eighth straight edge, and the second end of the eighth straight edge is connected to the first end of the ninth straight edge; the connection between the seventh straight edge and the eighth straight edge forms a third angle portion; the connection between the eighth straight edge and the ninth straight edge forms a seventh angle portion;

[0020] The fourth edge includes: a tenth straight side, an eleventh straight side, and a twelfth straight side; the second end of the tenth straight side is connected to the first end of the eleventh straight side, and the second end of the eleventh straight side is connected to the first end of the twelfth straight side; the connection between the tenth straight side and the eleventh straight side forms a fourth angle portion; the connection between the eleventh straight side and the twelfth straight side forms an eighth angle portion.

[0021] Optionally, the seventh straight side is arranged in parallel with the tenth straight side; the eighth straight side is arranged in parallel with the eleventh straight side; and the ninth straight side is arranged in parallel with the twelfth straight side.

[0022] Optionally, the extension straight line direction of the seventh straight side, the extension straight line direction of the eighth straight side, the extension straight line direction of the ninth straight side, the extension straight line direction of the tenth straight side, the extension straight line direction of the eleventh straight side, and the extension straight line direction of the twelfth straight side are all set at an angle to the first straight line direction and the second straight line direction.

[0023] Optionally, the auxiliary area surrounds the target product area; the plurality of auxiliary graphics in the first straight line direction are evenly spaced; and the plurality of auxiliary graphics in the second straight line direction are evenly spaced.

[0024] Compared with the prior art, the printing screen of the embodiment of the present invention has the following beneficial effects:

[0025] In the embodiment of the present invention, multiple auxiliary graphic arcs are interlocked in the first straight line direction, and the gap between two adjacent auxiliary graphics in the first straight line direction is a multi-segment broken line. Multiple auxiliary graphic arcs are interlocked in the second straight line direction, and the gap between two adjacent auxiliary graphics in the second straight line direction is a multi-segment broken line. This avoids the situation in the past where the gap between the auxiliary graphics is a straight line, resulting in the inability to display the ferrous metal material on the cross-section. When the cutting machine cuts along the first straight line direction and the second straight line direction, it can always cut on the auxiliary graphics, thereby improving the automatic recognition rate and production efficiency of the product on the assembly line machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a ceramic mesh body in the background technology;

[0027] Figure 2 It is a schematic diagram of the structure of a capacitor;

[0028] Figure 3 is a schematic diagram of the structure of a network body in an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the structure of a network body in an embodiment of the present invention;

[0030] Figure 5 1 is a schematic diagram of the relationship between the first cutting line, the second cutting line, and the position of the mesh body in an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the relationship between the first cutting line, the second cutting line, and the mesh body position in an embodiment of the present invention;

[0032] Figure 7 is a schematic diagram of the structure of the auxiliary graphics in an embodiment of the present invention;

[0033] Figure 8 is a schematic diagram of the structure of the auxiliary graphics in an embodiment of the present invention;

[0034] Fig. 9 is a schematic structural diagram of the mesh body and the auxiliary pattern after being cut along the second cutting line in an embodiment of the present invention;

[0035] Fig.10 is a schematic structural diagram of the mesh body and the auxiliary pattern after being cut along the second cutting line in an embodiment of the present invention;

[0036] Fig.11 It is a schematic structural diagram of the mesh body and the auxiliary graphics after being cut along the second cutting line in an embodiment of the present invention.

[0037] In the figure, 1, mesh body; 101, target product area; 102, auxiliary area; 2, auxiliary pattern; 21, first edge; 211, first straight edge; 212, second straight edge; 213, third straight edge; 22, second edge; 221, seventh straight edge; 222, eighth straight edge; 223, ninth straight edge; 23, third edge; 231, fourth straight edge; 232, fifth straight edge; 233, sixth straight edge; 24, fourth edge; 241, tenth straight edge; 242, eleventh straight edge; 243, twelfth straight edge; 3, inner electrode pattern; 4, first folded corner; 5, second folded corner; 6, third folded corner; 7, fourth folded corner; 8, first cutting line; 9, second cutting line; 10, fifth folded corner; 11, sixth folded corner; 12, seventh folded corner; 13, eighth folded corner; 14, capacitor; 141, inner electrode; 142, outer electrode. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] First, it should be noted that the top, bottom, upward, downward and other directions mentioned in this article are defined relative to the directions in the respective drawings, and they are relative concepts, and therefore can be changed according to different positions and different practical states. Therefore, these or other directions should not be understood as restrictive terms.

[0040] It should be noted that the term "comprising" does not exclude other elements or steps and "a" or "an" does not exclude a plurality.

[0041] In addition, it should be pointed out that any single technical feature described or implied in the embodiments of this document, or any single technical feature shown or implied in the accompanying drawings, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application that are not directly mentioned in this document.

[0042] It should also be understood that the terms "first", "second", etc. are used herein to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0043] It should be noted that in different drawings, the same reference numerals denote the same or substantially the same components.

[0044] In order to facilitate understanding of the present invention, a more comprehensive description of the printing screen will be given below with reference to the relevant drawings. The preferred embodiments of the printing screen are shown in the drawings. However, the printing screen can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the printing screen more thorough and comprehensive.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the printing screen herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0046] See also Figure 3 , Figure 4 , Figure 7 ,as well as Figure 8 A printing screen according to a preferred embodiment of an embodiment of the present invention comprises: a mesh body 1; the mesh body 1 is divided into a target product area 101 and an auxiliary area 102; an auxiliary graphic 2 is printed on the auxiliary area 102; and a plurality of inner electrode graphics 3 are printed in the target product area 101.

[0047] The auxiliary pattern 2 has a first edge 21 , a second edge 22 , a third edge 23 opposite to the first edge 21 , and a fourth edge 24 opposite to the second edge 22 .

[0048] The first edge 21 is provided with a first angled portion 4 convex outwardly; the third edge 23 is provided with a second angled portion 5 concave inwardly and matched with the first angled portion 4 .

[0049] The second edge 22 is provided with a third angled portion 6 which is convex outwards; the fourth edge 24 is provided with a fourth angled portion 7 which is concave inwards and matched with the third angled portion 6.

[0050] There are multiple auxiliary graphics 2; wherein, in the first straight line direction, the first corner portion 4 of one of two adjacent auxiliary graphics 2 among the multiple auxiliary graphics 2 is interlocked with the second corner portion 5 of the other auxiliary graphics 2; in the second straight line direction, the third corner portion 6 of one of two adjacent auxiliary graphics 2 among the multiple auxiliary graphics 2 is interlocked with the fourth corner portion 7 of the other auxiliary graphics 2; the first straight line direction is set at an angle to the second straight line direction.

[0051] The screen printing device of this embodiment can be used in manufacturing Figure 2 The process of the chip ceramic capacitor 14 shown in the figure shows the step of printing the inner electrode 141 on the mesh body 1. The chip ceramic capacitor 14 includes a multilayer ceramic mesh body 1, an inner electrode 141 and an outer electrode 142. The inner electrode 141 is formed by printing a metal paste on the ceramic mesh body 1 by screen printing. The printed screen is peeled off and stacked together at a certain distance. Then, a bottom protective layer (ceramic material) and a surface protective layer (ceramic material) are added. All the printed screens, bottom protective layers and surface protective layers are compacted by lamination. Finally, a number of capacitor chips are cut out by a certain cutting method. The chip is sintered at a high temperature to form the main part of the ceramic capacitor. Then, the outer electrodes 142 are sealed at both ends of the capacitor and connected to the inner electrodes 141 to produce a chip ceramic capacitor.

[0052] like Figure 1 and Figure 2As shown, in the traditional production process, the size of the screen pattern is consistent with the flat rectangular suction cup of the laminator. When the rectangular suction cup of the laminator is working, the vacuum adsorption force of the edge area is greater than that of the central area. In order to avoid affecting the product qualification rate, the edge area is not made into products, and only part of the auxiliary pattern is printed. Therefore, the screen pattern is divided into the target product area 101 and the auxiliary area 102 (the area shown by the dotted line). Due to the limitations of factors such as the precision of the machine equipment for making the printing screen, the screen steel wire material, the latex material, and the stacking height of the mesh body 1, the auxiliary pattern 2 in the traditional auxiliary area 102 is generally designed as a straight edge rectangle, the size of the rectangle is slightly larger than one-half of the inner electrode pattern 3, and there is a certain gap between adjacent straight edge rectangles. The color of the ceramic mesh body 1 material is lighter, close to white. The color of the metal electrode slurry is darker, close to black. Therefore, the color of the inner electrode pattern 3 and the auxiliary pattern 2 is generally black. Through staggered lamination, several layers of mesh bodies 1 are stacked together, and after lamination, all mesh bodies 1 are compacted to form a bar block. The size of the bar block is consistent with the screen pattern. In the cutting process, in order to load multiple blocks into the cutting machine for automatic continuous cutting, first, a portion of the block material must be vertically cut off from each of the four outer sides of the auxiliary area 102. The size of the cut is approximately half the length and width of a traditional straight-edge rectangle, so that the black metal material of the auxiliary graphic 2 can be identified from the cut surface, so that the cutting machine can accurately identify the specific position of the block from the cut surface and start automatic continuous cutting.

[0053] Since the operation of vertically cutting off a portion of the block material on each of the four sides of the outer periphery of the auxiliary area 102 is done manually, there is a certain error in the cutting accuracy. For the traditional straight-edge rectangular auxiliary graphics 2, there is a straight gap between adjacent auxiliary graphics 2. When the cutting machine cuts along the straight line on the gap, there is a situation where the cutting line position overlaps with the gap between the adjacent straight-edge rectangles, resulting in the section only showing the white ceramic mesh 1 material, and unable to show the black metal material layer, which ultimately causes the cutting machine to be unable to correctly identify the block position and error alarm, and then it is necessary to manually check whether the printed screen has been cut, resulting in the inability to complete automated cutting, affecting production efficiency.

[0054] Among them, the auxiliary graphics 2 of the auxiliary area 102 in the present application are used to penetrate the slurry to form auxiliary graphics, and there is a certain gap between adjacent auxiliary graphics 2 in the first straight line direction and the second straight line direction. In the present application, multiple auxiliary graphics 2 are arranged in sequence in the first straight line direction, and the first corner portion 4 of the previous auxiliary graphic 2 is embedded in the second corner portion 5 of the next auxiliary graphic 2, so that the arcs of the multiple auxiliary graphics 2 in the first straight line direction are embedded with each other, that is, the gap between two adjacent auxiliary graphics 2 in the first straight line direction is a multi-segment fold line.

[0055] In the second straight line direction of the present application, multiple auxiliary graphics 2 are arranged in sequence, and the first corner portion 4 of the previous auxiliary graphic 2 is embedded in the second corner portion 5 of the next auxiliary graphic 2, so that the multiple auxiliary graphics 2 in the second straight line direction are embedded in arcs, that is, the gap between two adjacent auxiliary graphics 2 in the second straight line direction is a multi-segment fold line. The cutting line of the cutting machine is cut in a straight line, and when cutting along the first straight line direction and the second straight line direction, it can always cut on the auxiliary graphics 2. In addition, the arrangement and structure of the auxiliary graphics 2 of the present application avoids the situation in which the previous cutting machine cuts along a straight line on the straight line gap between two adjacent auxiliary graphics 2, resulting in the inability to display ferrous metal materials, thereby improving the automatic recognition rate and production efficiency of the product on the assembly line machine.

[0056] Specifically, see Fig. 9 - Fig.11 The auxiliary pattern 2 is a metal paste pattern, so that when the cutting machine cuts the auxiliary pattern 2, its cut surface is black. The mesh body 1 is a ceramic mesh body 1 material, and its cut surface is white.

[0057] In one possible design, see Figure 5 - Figure 7 , the present application also includes: a plurality of first cutting lines 8 extending along a first straight line direction and a plurality of second cutting lines 9 extending along a second straight line direction. The first straight line direction is arranged perpendicular to the second straight line direction. Wherein, the cutting machine cuts the printed screen along the first straight line direction and the second straight line direction. Since the gap between two adjacent auxiliary graphics 2 in the first straight line direction is a multi-segment fold line and the gap between two adjacent auxiliary graphics 2 in the second straight line direction is a multi-segment fold line, when the cutting machine cuts the printed screen along the first cutting line 8 and the second cutting line 9, the cutting machine will definitely cut the auxiliary graphics 2, thereby displaying the ferrous metal material, effectively preventing the cutting machine from automatically stopping working.

[0058] Specifically, interlocking means that they are arranged at intervals and the concave and convex parts are matched.

[0059] Specifically, see Figure 5 The auxiliary graphics 2 in the first straight line direction and the second straight line direction are evenly spaced, so that the gaps between adjacent auxiliary graphics 2 on the mesh body 1 are evenly spaced.

[0060] For further information, see Figure 3 , Figure 7 ,as well as Figure 8The first edge 21 is provided with a fifth corner portion 10 which is recessed inward; the third edge 23 is provided with a sixth corner portion 11 which is protruding outward and matched with the fifth corner portion 10; in the first straight line direction, the first corner portion 4 and the fifth corner portion 10 are arranged in sequence, and the second corner portion 5 and the sixth corner portion 11 are arranged in sequence.

[0061] See also Figure 3 , Figure, and Figure 8 The second edge 22 is provided with a seventh corner portion 12 which is recessed inwardly; the fourth edge 24 is provided with an eighth corner portion 13 which is protruding outwardly and matched with the seventh corner portion 12; in the first straight line direction, the third corner portion 6 and the seventh corner portion 12 are arranged in sequence, and the fourth corner portion 7 and the eighth corner portion 13 are arranged in sequence.

[0062] The arrangement of the fifth corner portion 10, the sixth corner portion 11, the seventh corner portion 12, and the eighth corner portion 13 enables more ferrous metal materials to be cut when two adjacent auxiliary graphics 2 in the first straight line direction are cut along the second cutting line 9, thereby improving the recognition rate of the cutting machine.

[0063] Specifically, see Figure 7 and Figure 8 The first edge 21 includes: a first straight edge 211, a second straight edge 212, and a third straight edge 213. The first straight edge 211, the second straight edge 212, and the third straight edge 213 are connected in sequence, that is, the second end of the first straight edge 211 is connected to the first end of the second straight edge 212, and the second end of the second straight edge 212 is connected to the first end of the third straight edge 213. The first straight edge 211 and the second straight edge 212 are clamped to form a first angled portion 4, and the second straight edge 212 and the third straight edge 213 are clamped to form a fifth angled portion 10.

[0064] See also Figure 7 and Figure 8 The third edge 23 includes: a fourth straight edge 231, a fifth straight edge 232, and a sixth straight edge 233; the fourth straight edge 231, the fifth straight edge 232, and the sixth straight edge 233 are connected in sequence, that is, the second end of the fourth straight edge 231 is connected to the first end of the fifth straight edge 232, and the second end of the fifth straight edge 232 is connected to the first end of the sixth straight edge 233. The fourth straight edge 231 and the fifth straight edge 232 are clamped to form a second angled portion 5, and the fifth straight edge 232 and the sixth straight edge 233 are clamped to form a sixth angled portion 11.

[0065] Further, the first straight edge 211 is arranged in parallel with the fourth straight edge 231. The second straight edge 212 is arranged in parallel with the fifth straight edge 232, and the third straight edge 213 is arranged in parallel with the sixth straight edge 233, that is, the first edge 21 and the third edge 23 are arranged in an array in the second straight line direction, so that the arcs of the multiple auxiliary graphics 2 in the second straight line direction can be better fitted.

[0066] In one possible design, see Figure 5 and Figure 6 The extending straight line direction of the first straight edge 211, the extending straight line direction of the second straight edge 212, the extending straight line direction of the third straight edge 213, the extending straight line direction of the fourth straight edge 231, the extending straight line direction of the fifth straight edge 232, and the extending straight line direction of the sixth straight edge 233 are respectively set at an angle to the first straight line direction and the second straight line direction, so that when the cutting machine cuts along the second cutting line 9, a certain gap between two adjacent auxiliary graphics 2 is prevented from overlapping with the second cutting line 9, thereby increasing the area of ​​ferrous metal material cut out by the cutting machine.

[0067] For further information, see Figure 7 and Figure 8 The second edge 22 includes: a seventh straight edge 221, an eighth straight edge 222, and a ninth straight edge 223; the seventh straight edge 221, the eighth straight edge 222, and the ninth straight edge 223 are connected in sequence, that is, the second end of the seventh straight edge 221 is connected to the first end of the eighth straight edge 222, and the second end of the eighth straight edge 222 is connected to the first end of the ninth straight edge 223. The seventh straight edge 221 and the eighth straight edge 222 are clamped to form a third angled portion 6, and the eighth straight edge 222 and the ninth straight edge 223 are clamped to form a seventh angled portion 12;

[0068] See also Figure 7 and Figure 8 The fourth edge 24 includes: a tenth straight side 241, an eleventh straight side 242, and a twelfth straight side 243; the tenth straight side 241, the eleventh straight side 242, and the twelfth straight side 243 are connected in sequence, that is, the second end of the tenth straight side 241 is connected to the first end of the eleventh straight side 242, and the second end of the eleventh straight side 242 is connected to the first end of the twelfth straight side 243. The tenth straight side 241 and the eleventh straight side 242 are clamped to form a fourth angled portion 7; the eleventh straight side 242 and the twelfth straight side 243 are clamped to form an eighth angled portion 13.

[0069] Further, the seventh straight edge 221 is arranged in parallel with the tenth straight edge 241. The eighth straight edge 222 is arranged in parallel with the eleventh straight edge 242. The ninth straight edge 223 is arranged in parallel with the twelfth straight edge 243, that is, the second edge 22 and the fourth edge 24 are arranged in an array in the first straight line direction, so that the arcs of the multiple auxiliary graphics 2 in the first straight line direction can be better fitted.

[0070] In practical applications, see Figure 7 and Figure 8 The second end of the first straight side 211 is connected to the first end of the second straight side 212, the second end of the second straight side 212 is connected to the first end of the third straight side 213, the second end of the third straight side 213 is connected to the first end of the seventh straight side 221, the second end of the seventh straight side 221 is connected to the first end of the eighth straight side 222, the second end of the eighth straight side 222 is connected to the first end of the ninth straight side 223, the second end of the ninth straight side 223 is connected to the second end of the sixth straight side 233, the first end of the sixth straight side 233 is connected to the second end of the fifth straight side 232, the first end of the fifth straight side 232 is connected to the second end of the fourth straight side 231, the first end of the fourth straight side 231 is connected to the second end of the twelfth straight side 243, the first end of the twelfth straight side 243 is connected to the second end of the eleventh straight side 242, the first end of the eleventh straight side 242 is connected to the second end of the tenth straight side 241, and the first end of the tenth straight side 241 is connected to the first end of the first straight side 211 to form a closed figure.

[0071] Furthermore, the auxiliary area 102 surrounds the target product area 101, and the auxiliary area 102 is in a U-shape, thereby surrounding the target product area 101. The plurality of auxiliary graphics 2 in the first straight line direction are evenly spaced; the plurality of auxiliary graphics 2 in the second straight line direction are evenly spaced.

[0072] In one possible design, see Figure 6 In two obliquely adjacent auxiliary graphics 2, the midpoint of the line connecting the closest vertices is the cutting point, the first cutting line 8 and the second cutting line 9 pass through the corresponding cutting point, and the grid formed by the intersection of multiple first cutting lines 8 and second cutting lines 9 on the mesh body 1 is the cutting grid. In the cutting process, cutting can be performed along the first cutting lines 8 and the second cutting lines 9.

[0073] The inner electrode pattern 3 is a long rectangular strip extending along the first straight line direction. Each inner electrode pattern 3 is located in two laterally adjacent cutting grids, that is, the first cutting line 8 is located on the inner electrode pattern 3. In one embodiment, the symmetry center of the inner electrode pattern 3 in the second straight line direction is located on the cutting line. Multiple inner electrode patterns 3 are arranged at equal intervals in the first straight line direction and staggered in the second straight line direction. In the cutting process, the inner electrode pattern 3 is cut from the middle position to form two inner electrodes 141, and the vertical section position of the inner electrode 141 can be connected to the outer electrode 142.

[0074] In one possible design, see Figure 6 and Figure 7 , the length of the auxiliary pattern 2 in the first straight line direction is smaller than the length of the inner electrode pattern 3 in the first straight line direction. The length of the auxiliary pattern 2 in the second straight line direction is larger than the length of the inner electrode pattern 3 in the second straight line direction.

[0075] See also Figure 6 and Figure 7 The length of the cutting grid in the first straight direction is a, the length of the cutting grid in the second straight direction is b, the length from the first end of the first straight side 211 to the second end of the third straight side 213 is a1, and the length from the second end of the third straight side 213 to the second end of the twelfth straight side 243 is b1.

[0076] a1<a,b1<b,the magnitude of less than is jointly determined by the screen printing equipment of the capacitor 14, the material properties of the mesh 1 used for printing, the characteristics of the printing paste, the longitude of the production machine equipment and the specific product size. In one embodiment, the mesh 1 is made of ceramic material, and the printing paste is the metal inner electrode 141 paste. The magnitude of less than is jointly determined by the material properties of the ceramic mesh 1, the type, particle size, bonding performance, drying performance of the metal inner electrode 141 paste, the precision of the production machine equipment, and the specific product size. Generally, the magnitude of less than in the first straight line direction and the second straight line direction is within 5%, then in this embodiment a-a1≤3%a, b-b1≤3%b.

[0077] See also Fig.10 After the metal paste is printed, the mesh body 1 is laminated to form Fig.10 The multi-layer structure of the block, Fig.11What is shown is a cross-section of one of the cutting grids of the auxiliary area 102 after being cut along the second cutting line 9. After the broken line segment figure of the auxiliary graphic 2 is cut by the second cutting line 9, the cross-section can always show the black metal inner electrode 141 material. Even in the entire process of printing, laminating, and cutting, the actual cutting line is offset parallel to the original second cutting line 9 due to manual operation or machine equipment errors. The cross-section after actual cutting can still cut off the broken line segment of the auxiliary graphic 2, and can still reveal the same proportion of the black metal inner electrode 141 material on the cross-section, ensuring that the color difference ratio of the cross-section is maintained at a fixed value, thereby improving the automatic recognition rate and production efficiency of the product on the assembly line machine.

[0078] The present application also provides a method for preparing a capacitor, which is made using the above-mentioned printed screen, and comprises the following steps:

[0079] S100, staggering and stacking the printing screens; the screen body 1 includes a plurality of first cutting lines 8 extending along a first straight line direction and a plurality of second cutting lines 9 extending along a second straight line direction;

[0080] S200, performing a first cutting on the laminated printing screen along the first cutting line 8;

[0081] S300 , cutting the printing screen for the second time along the second cutting line 9 after the first cutting.

[0082] The first cutting line 8 and the second cutting line 9 both need to pass through the midpoint of the line connecting the closest vertices of two obliquely adjacent auxiliary figures 2 .

[0083] In summary, an embodiment of the present invention provides a printing screen. When the printing screen of the present application is cut using a cutting machine, the first cutting line 8 and the second cutting line 9 can always cut on the auxiliary graphic 2 in the cutting auxiliary area 102, and can allow the cutting machine to identify the ferrous metal material that penetrates the auxiliary graphic 2 on the vertical section. The present invention avoids the situation in the past where the cutting machine cuts along a straight line on the gap, causing the cutting line to overlap with the adjacent auxiliary graphic 2 gap, resulting in the section failing to display the ferrous metal material. The present invention has better adaptability to multi-layer laminated structures, and can improve the automation efficiency of the cutting machine and the product qualification rate.

[0084] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A printing screen, characterized in that: include: A mesh body, a plurality of first cutting lines extending along a first straight line direction, and a plurality of second cutting lines extending along a second straight line direction; The mesh body is divided into a target product area and an auxiliary area; the auxiliary area is printed with an auxiliary pattern; the target product area is printed with an inner electrode pattern; The auxiliary pattern has a first edge, a second edge, a third edge opposite to the first edge, and a fourth edge opposite to the second edge; The first edge is provided with a first angled portion convex outward; the third edge is provided with a second angled portion concave inward and matched with the first angled portion; The second edge is provided with a third angled portion convex outward; the fourth edge is provided with a fourth angled portion concave inward and matched with the third angled portion; There are multiple auxiliary graphics; wherein, in the first straight line direction, the first corner portion of one of two adjacent auxiliary graphics among the multiple auxiliary graphics is interlocked with the second corner portion of the other auxiliary graphic; in the second straight line direction, the third corner portion of one of two adjacent auxiliary graphics among the multiple auxiliary graphics is interlocked with the fourth corner portion of the other auxiliary graphic; the first straight line direction is set at an angle to the second straight line direction.

2. The printing screen according to claim 1, characterized in that The first straight line direction is perpendicular to the second straight line direction.

3. The printing screen according to claim 2, characterized in that The first edge is provided with a fifth angle portion which is concave inwards; the third edge is provided with a sixth angle portion which is convex outwards and matches the fifth angle portion; in the first straight line direction, the first angle portion and the fifth angle portion are arranged in sequence, and the second angle portion and the sixth angle portion are arranged in sequence; The second edge is provided with a seventh angle portion which is recessed inwardly; the fourth edge is provided with an eighth angle portion which is protruding outwardly and matched with the seventh angle portion; in the first straight line direction, the third angle portion and the seventh angle portion are arranged in sequence, and the fourth angle portion and the eighth angle portion are arranged in sequence.

4. The printing screen according to claim 3, characterized in that The first edge includes: a first straight edge, a second straight edge, and a third straight edge; the second end of the first straight edge is connected to the first end of the second straight edge, and the second end of the second straight edge is connected to the first end of the third straight edge; the connection between the first straight edge and the second straight edge forms a first angled portion; the connection between the second straight edge and the third straight edge forms a fifth angled portion; The third edge includes: a fourth straight edge, a fifth straight edge, and a sixth straight edge; the second end of the fourth straight edge is connected to the first end of the fifth straight edge, and the second end of the fifth straight edge is connected to the first end of the sixth straight edge; the connection between the fourth straight edge and the fifth straight edge forms a second angle portion; the connection between the fifth straight edge and the sixth straight edge forms a sixth angle portion.

5. The printing screen according to claim 4, characterized in that The first straight edge is arranged in parallel with the fourth straight edge; the second straight edge is arranged in parallel with the fifth straight edge; and the third straight edge is arranged in parallel with the sixth straight edge.

6. The printing screen according to claim 4, characterized in that The extension straight line direction of the first straight edge, the extension straight line direction of the second straight edge, the extension straight line direction of the third straight edge, the extension straight line direction of the fourth straight edge, the extension straight line direction of the fifth straight edge, and the extension straight line direction of the sixth straight edge are respectively set at an angle to the first straight line direction and the second straight line direction.

7. The printing screen according to claim 3, characterized in that The second edge includes: a seventh straight edge, an eighth straight edge, and a ninth straight edge; the second end of the seventh straight edge is connected to the first end of the eighth straight edge, and the second end of the eighth straight edge is connected to the first end of the ninth straight edge; the connection between the seventh straight edge and the eighth straight edge forms a third angle portion; the connection between the eighth straight edge and the ninth straight edge forms a seventh angle portion; The fourth edge includes: a tenth straight side, an eleventh straight side, and a twelfth straight side; the second end of the tenth straight side is connected to the first end of the eleventh straight side, and the second end of the eleventh straight side is connected to the first end of the twelfth straight side; the connection between the tenth straight side and the eleventh straight side forms a fourth angle portion; the connection between the eleventh straight side and the twelfth straight side forms an eighth angle portion.

8. The printing screen according to claim 7, characterized in that The seventh straight side is arranged in parallel with the tenth straight side; the eighth straight side is arranged in parallel with the eleventh straight side; and the ninth straight side is arranged in parallel with the twelfth straight side.

9. The printing screen according to claim 7, characterized in that The extension straight line direction of the seventh straight side, the extension straight line direction of the eighth straight side, the extension straight line direction of the ninth straight side, the extension straight line direction of the tenth straight side, the extension straight line direction of the eleventh straight side, and the extension straight line direction of the twelfth straight side are all set at an angle with the first straight line direction and the second straight line direction.

10. The printing screen according to claim 2, characterized in that The auxiliary area surrounds the target product area on all sides; the plurality of auxiliary graphics in the first straight line direction are arranged at even intervals; and the plurality of auxiliary graphics in the second straight line direction are arranged at even intervals.

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