Screen printing plate with improved structure

Abstract

A printing screen with an improved structure comprises a screen frame and screen cloth. The screen cloth is arranged in the screen frame, and the screen cloth is composed of a plurality of yarns. Each yarn is curved and has a plurality of wave crests and a plurality of wave troughs. The screen cloth is provided with a pattern opening area, and the pattern opening area comprises a first pattern part. Wherein the line segment of the yarn in the first pattern part is substantially not provided with a wave trough.

Description

Technical Field

[0001] The present disclosure relates to a printing screen, and in particular to a printing screen with an improved structure. Background Art

[0002] See also Figures 1A to 1C The schematic diagram of the structure of the conventional printing screen 100 is shown. The printing screen 100 is composed of a screen frame 110 and a mesh 120, and the mesh 120 is composed of a plurality of first direction yarns 122 (e.g., transverse yarns) and a plurality of second direction yarns 124 (e.g., longitudinal yarns) made of metal materials interwoven. Due to the up-and-down interweaving of the first direction yarns 122 and the second direction yarns 124, they present a curved shape, such as Figure 1B The printing screen 100 shown extends along Figure 1A A schematic diagram of the structure of the cross section of the middle section line A-A'. Figure 1B It can be seen from the figure that the first direction yarn 122 is pushed by the second direction yarn 124, presenting a curved shape including a plurality of crests P1-Pn and a plurality of troughs V1-Vn interlaced with each other.

[0003] In the prior art, in order to print finer graphics such as precision circuits, the amount of ink penetration is often increased by removing part of the yarn on the mesh to avoid incomplete lines. Figure 1A In the embodiment, the mesh 120 includes a pattern opening area 126, and the shape of the pattern opening area 126 is the pattern to be printed on the printed object. The pattern opening area 126 is located between the second direction yarns 1241 and 1243. In order to increase the ink penetration, the second direction yarns 1242 covered by the pattern opening area 126 can be removed, such as Figure 1C The illustrated partial enlarged structural schematic diagram of the printing screen 100 after yarn removal. Since the first direction yarn 122 and the second direction yarn 124 are made of a relatively hard material such as metal, the deformation of the yarn caused by the initial process will still be maintained even after the yarn removal process. In short, in the graphic opening area 126, even if the second direction yarn 1242 is removed, the peaks Pa, Pb, Pc (indicated by black dots in the figure) and the valleys Va, Vb (indicated by white dots in the figure) still exist. Summary of the invention

[0004] As mentioned above, by removing part of the second direction yarns, the ink penetration of the mesh can be improved, but the deformation of the first direction yarns will still exist, so the line segments of the first direction yarns in the pattern opening area will still include multiple peaks and troughs. This will result in uneven thickness of the pattern when printing, and compared to the peaks, because the troughs are closer to the printed object, the ink penetration space in this area is narrower and the ink penetration is lower, so the printed pattern is less full. This situation, when used in circuit printing in the electronics industry, will cause uneven resistance on the circuit path, thereby adversely affecting the operating efficiency of the entire circuit. In order to improve the incompleteness of the pattern, it must be compensated by repeated printing, which will result in too much ink printed on the printed object, thereby reducing the fineness of the pattern.

[0005] In order to solve the above-mentioned problems, a printing screen is proposed in a technical method of the present disclosure. The printing screen includes a screen frame and a mesh cloth. The mesh cloth is arranged in the screen frame. The mesh cloth is composed of a plurality of yarns. Each of the yarns is curved and has a plurality of crests and a plurality of troughs. The mesh cloth has a graphic opening area, and the graphic opening area includes a first graphic portion. The line segments of the yarns located in the first graphic portion substantially do not have troughs.

[0006] In one embodiment, the number of crests of the line segment of the yarn located in the first graphic portion is greater than 90% of the total number of crests and troughs of the line segment of the yarn located in the first graphic portion.

[0007] In one embodiment, the yarns are divided into a plurality of first direction yarns and a plurality of second direction yarns. The first direction yarns and the second direction yarns are arranged alternately. The first graphic portion only has first direction yarns, and the spacing between adjacent first direction yarns in the first graphic portion is greater than or equal to the spacing between adjacent first direction yarns outside the first graphic portion.

[0008] In one embodiment, the yarn is located at the crest of the first pattern portion in a wavy, sawtooth or square wave shape.

[0009] In one embodiment, the pattern opening area further includes a second pattern portion, the second pattern portion is adjacent to the first pattern portion, and the width of the first pattern portion is smaller than the width of the second pattern portion.

[0010] Through the application of the disclosed embodiment, since the pattern opening area does not substantially include the trough, the printed pattern is full, so there is no need to repeat printing to supplement the pattern. Not only is the printing precision higher than that of the conventional screen, but the printing time and ink amount costs are also greatly reduced. In addition, since the steps of repeated printing are reduced, the wear degree of the mesh is reduced, and the product life is also extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1AA schematic diagram showing the structure of a known printing screen.

[0012] Figure 1B A schematic diagram showing a cross-section of a known printing screen.

[0013] Figure 1C A partially enlarged schematic perspective view of the structure of a known printing screen is shown.

[0014] Figure 2A A schematic diagram showing the architecture of a printing screen according to some embodiments of the present disclosure.

[0015] Figure 2B A partially enlarged structural stereoscopic diagram of a printing screen according to some embodiments of the present disclosure is shown.

[0016] Figure 3A A schematic diagram showing a cross section of a printing screen according to some embodiments of the present disclosure.

[0017] Figure 3B A schematic diagram showing a cross section of a printing screen according to some embodiments of the present disclosure.

[0018] Figure 3C A schematic diagram showing a cross section of a printing screen according to some embodiments of the present disclosure.

[0019] Figure 4 A schematic diagram showing the architecture of a printing screen according to some embodiments of the present disclosure.

[0020] The reference numerals are as follows:

[0021] 100, 200, 200': Printing screen

[0022] 110, 210: Screen frame

[0023] 120, 220: Mesh

[0024] 122, 222, 2221-2225: first direction yarn

[0025] 124, 1241-1243, 224: Second direction yarn

[0026] 126, 226, 226': Graphic opening area

[0027] 2262: First Graphics Section

[0028] 2264: Second Graphics Section

[0029] A-A', B-B': hatching line

[0030] d1, d2: spacing

[0031] P1~Pn、Pa~Pf、Pf'、Pf”: Peak

[0032] V1~Vn, Va, Vb: trough DETAILED DESCRIPTION

[0033] The following embodiments are described in detail with the accompanying drawings, but the specific embodiments described are only used to explain the present disclosure and are not used to limit the present disclosure. The description of the structural operation is not used to limit the order of its execution. Any structure recombined by the elements to produce a device with equal efficacy is within the scope of the present disclosure. The directional terms mentioned in the present disclosure, such as "up", "down", "left", "right", "longitudinal", "horizontal", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are only used to illustrate and understand the present disclosure, not to limit the present disclosure. In addition, the drawings are only used for schematic illustration and are not drawn according to their actual size.

[0034] In addition, the terms "first" and "second" mentioned in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different parts, and the drawings are only used for schematic illustration. The term "substantially" refers to a degree between 80% and 100%.

[0035] The terms used throughout the specification and claims have the ordinary meanings of each term used in this field, in the context of this disclosure, and in the specific context, unless otherwise noted. Certain terms used to describe the present disclosure will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art on the description of the present disclosure.

[0036] See also Figure 2A , Figure 2A The top view of the schematic diagram of the structure of the printing screen 200 of some embodiments of the present disclosure is shown. The printing screen 200 is, for example, rectangular, but not limited to this, and is formed by fixing a mesh 220 on a mesh frame 210. The mesh 220 is composed of a plurality of interwoven yarns. Specifically, the yarns can be divided into first direction yarns 222 ( Figure 2A The transverse yarns in the second direction) and the second direction yarns 224 ( Figure 2A The first direction yarn 222 and the second direction yarn 224 are interlaced due to the interweaving process, causing them to push each other and present a curved shape with multiple crests and multiple troughs. The first direction yarn 222 and the second direction yarn 224 are arranged in an interlaced manner in the extension direction, for example, perpendicular to each other. It should be understood that Figure 2AThe structure of the printing screen 200 is only a simplified schematic diagram for convenience of explanation. In actual application, the first direction yarns 222 and the second direction yarns 224 of the mesh 220 can also be arranged in a non-vertical manner, such as staggered at a specific angle, or staggered irregularly, etc., which is not limited in this article. In addition, the interweaving method and order of the first direction yarns 222 and the second direction yarns 224 can be adjusted according to actual application requirements. The number of the first direction yarns 222 and the second direction yarns 224 of the mesh 220 and the number of meshes formed by the two are also not actual application situations.

[0037] Continuing from the above embodiment, the mesh 220 has a graphic opening area 226, and the graphic opening area 226 is, for example, composed of a rectangular first graphic portion 2262. In this example, the shape of the first graphic portion 2262 is the pattern to be printed on the printed object (not shown). Generally speaking, the portion other than the graphic opening area 226 on the mesh 220 is shielded, so that the ink can only pass through the graphic opening area 226, and the pattern of the graphic opening area 226 (first graphic portion 2262) can be formed on the printed object. It should be understood that the shape, size and number of yarns covered by the first graphic portion 2262 are only examples, and can be adjusted accordingly according to the needs of actual use.

[0038] In order to print finer graphics, the graphic opening area 226 is de-yarned without the second direction yarn 224, as shown in the figure. In addition, in the embodiment of the present disclosure, the valley portion of the first direction yarn 222 in the first graphic portion 2262 is further removed. For details, please refer to Figure 2B , Figure 2B A partially enlarged schematic diagram of the structure of the printing screen 200 of some embodiments of the present disclosure is shown. Figure 2A and 2B It can be seen that the first graphic portion 2262 does not have a trough, that is, the yarn segments (first direction yarns 2222 and 2224) originally located at the trough in the first graphic portion 2262 are removed, and only the Pd, Pe, Pf portions ( Figure 2B The yarns (first direction yarns 2221, 2223 and 2225) of the first graphic portion 2262 are marked with black dots. It should be understood that, although in this example, the line segments of the adjacent first direction yarns 222 in the first graphic portion 2262 are repeatedly arranged at the crests and troughs, the weaving method of the first direction yarns 222 and the second direction yarns 224 of the mesh 220 can be adjusted according to the actual application, so it is also possible that the line segments of the two adjacent first direction yarns 222 in the first graphic portion 2262 are both at the crests or troughs. Therefore, the removal should be performed according to the position of the first graphic portion 2262 that is actually the trough.

[0039] Since the first graphic portion 2262 has only wave crests but no wave troughs, the ink placement space between the first graphic portion 2262 and the printed object is relatively wide and sufficient, so the pattern printed on the printed object through the first graphic portion 2262 will present a full and uniform appearance. As mentioned above, the shape, size and number of first directional yarns 222 covered by the first graphic portion 2262 are only examples. In other embodiments, the first graphic portion 2262 can be of any shape and cover more or less first directional yarns 222.

[0040] In another embodiment, according to printing requirements or manufacturing costs, only most of the troughs covered in the first graphic portion 2262 may be removed, or the troughs preset to be removed in the first graphic portion 2262 may not be completely removed due to process errors in the actual manufacturing process. In short, there may be a situation where all the troughs covered in the first graphic portion 2262 are not completely removed. However, within the allowable value, the line segment of the first direction yarn 222 located in the first graphic portion 2262 substantially has no troughs, and the desired printing effect can still be achieved. In a preferred embodiment, the number of all the peaks of the line segment of the first direction yarn 222 located in the first graphic portion 2262 is greater than 90% of the total number of the peaks and troughs of the line segment of the first direction yarn 222 located in the first graphic portion 2262, which can achieve a near-ideal printing effect.

[0041] Continuing from the above embodiment, by removing all or part of the troughs of the first direction yarn 222 in the first graphic portion 2262, the spacing between the remaining line segments of the first direction yarn 222 in the first graphic portion 2262 will be greater than or equal to the spacing between two adjacent first direction yarns 222 outside the first graphic portion 2262. Figure 2A In the printing screen 200 shown, the spacing between two adjacent first direction yarns 222 outside the first graphic portion 2262 (for example, the portion of the first direction yarns 2221 and 2222 located outside the first graphic portion 2262) is d1, and in the first graphic portion 2262, since some line segments at the troughs of the first direction yarns 2222 and 2224 are removed, and only some line segments at the troughs of the first direction yarns 2221, 2223, and 2225 remain, the spacing d2 between two adjacent first direction yarns 222 in the first graphic portion 2262 (for example, the segment of the first direction yarns 2221 and 2223 located in the first graphic portion 2262) is greater than d1.

[0042] In one embodiment, the troughs in the first pattern portion 2262 can be eliminated by, for example, rolling, and the line segments of the first direction yarn 222 in the first pattern portion 2262 can all be presented as peaks. Figure 3A , Figure 3A The printing screen 200 is shown according to Figure 2A The schematic diagram of the structure of the cross section of the middle section line BB'. Specifically, Figure 3A That is, a cross-sectional view of the printing screen 200 along the first direction yarn 2225. Figure 3A As can be seen in the figure, the crest Pf of the first direction yarn 2225 in the first graphic portion 2262 presents a wavy shape. By rolling, the first direction yarn 222 (first direction yarn 2222, 2224) that was originally at the trough in the first graphic portion 2262 can also be formed into a wavy shape like the crest Pf. In this way, without further removing the line segments at the trough in the first graphic portion 2262, all the line segments of the first direction yarn 222 in the first graphic portion 2262 can be at the crest.

[0043] In another embodiment, the pressing device or method can be adjusted according to the needs to make the line segment of the first direction yarn 222 in the first graphic portion 2262 present a single or mixed shape such as a special wave shape. Figure 3B In the embodiment of the present invention, the line segment of the first direction yarn 2225 located in the first pattern portion 2262 can be pressed by a device including a sawtooth shaping portion to form a sawtooth-shaped peak Pf'. Figure 3C In the embodiment of the present invention, the line segment of the first direction yarn 2225 located in the first graphic portion 2262 is pressed by an apparatus including a rectangular shaping portion to present a square wave-like peak Pf". Through the application of the above embodiment, in addition to eliminating the need for an additional step of removing the trough, the space between the first graphic portion 2262 and the printed object can be changed according to the change in the shape of the peak to meet the requirements of different printing fineness.

[0044] In another embodiment, the graphic opening area is not necessarily composed of a first graphic portion of a single shape. In practical applications, the graphic opening area may include a plurality of graphic portions of different shapes according to the pattern to be printed. Among them, only the yarns in part of the graphic portion may be removed or pressed according to the needs. Figure 4 , Figure 4The schematic diagram of the structure of the printing screen 200' of some embodiments of the present disclosure is shown. The structure of the printing screen 200' is roughly the same as that of the printing screen 200, and it is also formed by setting the mesh 220 on the screen frame 210. The detailed description of the components can be found in the relevant paragraphs of the previous text, which will not be repeated here. The difference between the printing screen 200' and the printing screen 200 is that the graphic opening area 226' on the mesh 220 of the printing screen 200' is composed of a first graphic portion 2262 and a second graphic portion 2264, wherein the first graphic portion 2262 is adjacent to the second graphic portion 2264, and the width of the first graphic portion 2262 is smaller than the width of the second graphic portion 2264. In this embodiment, since the width of the second graphic portion 2264 is relatively wide and the ink penetration range is relatively large, the fullness of the pattern printed thereon is less affected by the troughs in the second graphic portion 2264. Therefore, only the troughs in the first graphic portion 2262 may be removed without removing the troughs in the second graphic portion 2264. It should be understood that the shapes of the first graphic portion 2262 and the second graphic portion 2264 and their adjacent modes are only for illustration, and the present disclosure does not limit this.

[0045] Although the embodiments of the present disclosure have been disclosed above, they are not intended to limit the present disclosure. Those skilled in the art may make some changes and modifications without departing from the spirit and scope of the present disclosure. For example, according to special manufacturing requirements, the peaks in the graphic part may be removed while the valleys may be retained, etc. However, this is only a simple application change of the present disclosure. Therefore, the scope of protection of the present disclosure shall be defined by the attached claims.

Claims

1. A printing screen with an improved structure, comprising: a frame; and A mesh cloth is arranged in the mesh frame, wherein the mesh cloth is composed of a plurality of yarns, each of the plurality of yarns is curved and has a plurality of crests and a plurality of troughs, and the mesh cloth has a graphic opening area, and the graphic opening area includes: A first graphic portion, wherein a line segment in which a plurality of the yarns are located does not have a plurality of the troughs.

2. A printing screen with an improved structure as described in claim 1, wherein the number of the plurality of crests possessed by the line segments where the plurality of yarns are located in the first graphic portion is greater than 90% of the total number of the plurality of crests and the plurality of troughs possessed by the line segments where the plurality of yarns are located in the first graphic portion.

3. A printing screen with an improved structure as described in claim 1 or 2, wherein the plurality of yarns are divided into a plurality of first direction yarns and a plurality of second direction yarns, the plurality of first direction yarns and the plurality of second direction yarns are arranged alternately, the first graphic portion only has a plurality of first direction yarns, and the spacing between adjacent plurality of first direction yarns in the first graphic portion is greater than or equal to the spacing between adjacent plurality of first direction yarns outside the first graphic portion.

4. A printing screen with an improved structure as described in claim 1 or 2, wherein the plurality of yarns are located at the plurality of wave peaks of the first graphic portion in one of a wavy, sawtooth or square wave shape.

5. The printing screen with an improved structure as claimed in claim 1 or 2, wherein the graphic opening area further comprises: A second graphic portion is adjacent to the first graphic portion, wherein the width of the first graphic portion is smaller than the width of the second graphic portion.

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