Reinforced filament composite screen printing plate based on regional stress demand difference and processing method thereof
By using differentiated design to enhance the composite wire mesh, the problem of varying mechanical requirements in local reinforcement areas of the mesh was solved, thereby improving the fatigue life and reliability of the mesh while reducing production costs.
Patent Information
- Application Number
- CN202610190874.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-10
- Publication Date
- 2026-05-05
AI Technical Summary
Existing technologies employ a uniform reinforcement strategy in the local reinforcement areas of the screen printing plate, which cannot meet the differentiated mechanical requirements of different areas. This results in insufficient reinforcement in high-risk areas and material redundancy in low-risk areas, making it impossible to simultaneously achieve cost optimization and microscopic damage prevention.
A composite mesh with reinforcing wires is designed based on the differences in stress requirements in different regions. By setting reinforcing wires with different densities and strengths in the high tensile fatigue requirement zone, the compressive rigidity requirement zone, and the structural balance requirement zone, and achieving a linear gradient of density in the transition zone, the compressive strength and wear resistance are improved by combining ceramic coating.
This method achieves targeted reinforcement of the screen printing plate in high-stress areas, reduces material redundancy, improves fatigue life and reliability, and significantly reduces production costs.
Smart Images
Figure CN121973543A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of composite screen printing technology, and more specifically, to a reinforced wire composite screen printing plate and its processing method based on the differences in regional stress requirements. Background Technology
[0002] In the field of fine printing, in order to improve the fatigue resistance of metal screens during long-term use, existing technologies usually set reinforcing wires or similar strengthening structures in local key areas of the screen (such as connecting lines with large spans) to improve the mechanical strength of specific areas through local additive manufacturing.
[0003] However, these existing technical solutions share a common drawback: they typically treat the area requiring reinforcement as a single unit and employ a uniform reinforcement strategy within this area, using reinforcing filaments of the same material, diameter, and density. The actual patterns on the screen are complex and diverse, even within the same local area requiring reinforcement, encompassing different sections ranging from large-sized opening edges to small-sized openings, and even solid connecting lines. These different sections experience significantly different stress levels and primary failure modes during actual printing. The edges of large openings are mainly subjected to high cyclic tensile stress, making them prone to fatigue fracture. The dense grid / small opening area is structurally fragile, and the main threat is local extrusion and plastic deformation caused by foreign object jamming, which leads to permanent damage. The solid area is mainly for support and compression, and has high inherent strength.
[0004] A uniform, one-size-fits-all reinforcement approach cannot simultaneously meet the aforementioned differentiated mechanical requirements. This may result in insufficient reinforcement in high-risk areas and material redundancy in low-risk areas, failing to achieve cost optimization while ensuring reliability, and failing to provide effective prevention against microscopic damage caused by foreign object obstruction.
[0005] Therefore, there is an urgent need for a screen reinforcement technology that can differentiate the material properties and arrangement structure of the reinforcing wires according to the dominant stress requirements of different regions (tensile fatigue resistance, extrusion rigidity resistance, and structural balance requirements), thereby achieving a balance between macroscopic fatigue resistance and microscopic damage prevention. Summary of the Invention
[0006] To address the shortcomings of existing technologies, the present invention aims to provide a reinforced wire composite screen and its processing method based on the differences in regional stress requirements.
[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a reinforcing wire composite mesh based on the difference in regional stress requirements, comprising a bottom layer, an intermediate composite layer and a top layer, wherein the composite mesh has a plurality of hollow openings, and a plurality of reinforcing wires passing through the hollow openings are disposed in the intermediate composite layer. The composite mesh forms a high tensile fatigue requirement zone, a high compressive rigidity requirement zone and a structural balance requirement zone corresponding to the width of the hollow openings. The arrangement density or strength of the reinforcing wires in the high tensile fatigue requirement zone, the high compressive rigidity requirement zone and the structural balance requirement zone increases as the width of the hollow openings increases.
[0008] The present invention is further configured such that the reinforcing wire is arranged along the length extension direction perpendicular to the hollow opening.
[0009] The present invention is further configured such that: the size of the hollow opening in the high tensile fatigue requirement zone is ≥ a first threshold; the size of the hollow opening in the high compressive rigidity requirement zone is < the first threshold and > a second threshold; and the size of the hollow opening in the structural balance requirement zone is ≤ the second threshold.
[0010] The present invention is further configured such that: the first threshold is 0.015 mm, the arrangement density of reinforcing wires in the high tensile fatigue requirement zone is 30-40 wires / mm; the second threshold is 0.006 mm, the arrangement density of reinforcing wires in the high compressive rigidity requirement zone is 10-20 wires / mm; and the arrangement density of reinforcing wires in the structural balance requirement zone is 0-3 wires / mm.
[0011] The present invention is further configured such that: the reinforcing wire in the high tensile fatigue requirement zone is made of a high-strength material, preferably tungsten steel wire; the reinforcing wire in the high compressive rigidity requirement zone is made of a high-rigidity material, preferably stainless steel wire; and the reinforcing wire in the structural balance requirement zone is made of a low-cost material or omitted, preferably copper-plated steel wire.
[0012] The present invention is further configured such that all the reinforcing wires have the same diameter, which is 0.005-0.02 mm.
[0013] The present invention is further configured such that: in the composite mesh, a transition zone is provided between any two adjacent regions in the high tensile fatigue requirement zone, the high extrusion rigidity requirement zone, and the structural balance requirement zone; the arrangement density of the reinforcing wires in the transition zone gradually changes linearly to both sides along the boundary line of the two adjacent regions, and the gradient range covers the arrangement density range of the two adjacent reinforcing parts.
[0014] The present invention is further configured such that: the outer surface of the top layer away from the intermediate composite layer is provided with a ceramic coating, the material of the ceramic coating is alumina ceramic or zirconia ceramic, the coating thickness is 0.001-0.003mm, and it is formed by plasma spraying process, which is used to improve the compressive strength and wear resistance of the top layer.
[0015] A method for processing a composite screen printing plate includes the following steps: S1. Obtain the target pattern data of the screen printing plate, and divide the screen printing plate pattern area into a high tensile fatigue requirement area, a high extrusion rigidity requirement area and a structural balance requirement area according to the preset first threshold and second threshold. S2. Based on the dominant mechanical requirements of each region, formulate differentiated reinforcing wire configuration schemes: for the high tensile fatigue requirement area, specify the first high-strength material and 35-40 reinforcing wires / mm; for the high extrusion rigidity requirement area, specify the second high rigidity material and 10-20 reinforcing wires / mm; for the structural balance requirement area, specify the third low-cost material and 1-3 reinforcing wires / mm or no reinforcement configuration. S3. Preparation of the bottom layer: Select nickel sheet, stainless steel or PI film as raw materials, process to form hollow openings, and control the thickness of the single layer of the bottom layer to be 0.003-0.02mm; S4. Preparation of the intermediate composite layer: S41. Prepare the main layer by selecting a PI film and processing it to form a pattern corresponding to the hollowed-out opening in the bottom layer; S42. Based on the configuration scheme in step S2, use precision fiber placement equipment to lay reinforcing fibers of different materials and densities in the corresponding areas of the main body layer. S43. By coating with high-temperature resistant PI adhesive and curing at 180-220℃, the reinforcing wire and the main body layer are integrally fixed to form an intermediate composite layer in which the reinforcing wire is completely covered; S5. Composite base layer and intermediate composite layer: High-temperature resistant PI adhesive is used to bond and fix the base layer and intermediate composite layer to form a preliminary composite; S6. Preparation and composite of top reinforcement layer: Select nickel sheet to process to form a hollow opening corresponding to the hollow opening of the bottom layer, and coat its surface with a ceramic coating through plasma spraying process, and then cover it on the upper surface of the middle composite layer, and combine it with the preliminary composite body into an integrated three-layer structure through PI adhesive bonding or laser spot welding process. S7. Perform flatness correction, dimensional accuracy inspection and mechanical property testing on the composite screen to obtain the finished composite screen.
[0016] The present invention is further configured such that: in step S2, the range of the transition zone, the starting / ending value of the density gradient, and the gradient slope are calibrated. When the equipment enters the transition zone, the control system adjusts the yarn feeding speed, needle movement speed or needle spacing in real time according to the preset gradual parameters to achieve a continuous gradual change in the density of the reinforcing yarn. When the equipment leaves the transition zone and enters the fixed density zone, it immediately returns to the fixed parameters of static fiber placement.
[0017] In summary, the present invention has the following beneficial effects: 1. In areas with large perforated openings and high tensile fatigue requirements, high-density or high-strength reinforcing wires are used to primarily bear the maximum tensile stress and prevent fatigue fracture. In areas with medium perforated openings and high compressive rigidity requirements, medium-density or medium-strength reinforcing wires are used to provide support, improve the local rigidity of the material, and effectively resist the compression caused by foreign objects entering the perforated openings, preventing permanent damage. In areas with small perforated openings or no perforated openings, low-density or low-strength reinforcing wires are used, relying on their own structural strength to achieve lightweight support. 2. By precisely matching the opening size with the reinforcement parameters, key reinforcement is achieved in the large opening area where stress is concentrated and easy to break, which fundamentally improves the fatigue life and reliability of the screen. In low-risk areas, the use of reinforcing wires is reduced or even eliminated, avoiding material redundancy caused by the uniform reinforcement of existing technologies and significantly reducing production costs. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of Example 1; Figure 2 for Figure 1 A magnified view of part A in the middle; Figure 3 This is a top view of the structure of Example 1.
[0019] Figure descriptions: 1. Bottom layer; 2. Middle composite layer; 3. Top layer; 4. Hollowed-out opening; 5. Reinforcing wire; 6. High tensile fatigue resistance zone; 7. High compressive rigidity resistance zone; 8. Structural balance zone; 9. Transition zone. Detailed Implementation
[0020] The present invention will be further described in detail below with reference to the accompanying drawings.
[0021] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.
[0022] Example 1 like Figure 1-3As shown, a composite mesh with reinforcing wires 5 according to the difference in regional stress requirements includes a bottom layer 1, a middle composite layer 2 and a top layer 3. The composite mesh has several hollow openings 4. Several reinforcing wires 5 are arranged in the middle composite layer 2 through the hollow openings 4. The composite mesh forms a high tensile fatigue requirement zone 6, a high compressive rigidity requirement zone 7 and a structural balance requirement zone 8 corresponding to the width of the hollow openings 4. The arrangement density or strength of the reinforcing wires 5 in the high tensile fatigue requirement zone 6, the high compressive rigidity requirement zone 7 and the structural balance requirement zone 8 increases as the width of the hollow openings 4 increases.
[0023] In the high tensile fatigue demand zone 6 with a large perforation opening 4, high-density or high-strength reinforcing wires 5 are used to primarily bear the maximum tensile stress and prevent fatigue fracture. In the high compressive rigidity demand zone with a medium perforation opening 4, medium-density or medium-strength reinforcing wires 5 are used to provide support, improve the local rigidity of the material in this area, and effectively resist the compression caused by foreign objects entering the perforation opening 4, preventing permanent damage. In areas with a small perforation opening 4 or no perforation opening 4, low-density or low-strength reinforcing wires 5 are used, relying on their own structural strength to achieve lightweight support. By precisely matching the opening size with the reinforcement parameters, key reinforcement is achieved in the stress-concentrated and easily fractured large opening areas, fundamentally improving the fatigue life and reliability of the screen. The use of reinforcing wires 5 is reduced or even eliminated in low-risk areas, avoiding material redundancy caused by the uniform reinforcement of existing technologies and significantly reducing production costs.
[0024] The reinforcing wire 5 is set along the length direction perpendicular to the hollow opening 4 and passes through the hollow opening 4, effectively resisting the compression and plastic deformation caused by foreign objects blocking it.
[0025] The size of the hollow opening 4 in the high tensile fatigue requirement zone 6 is greater than or equal to the first threshold, which is 0.015 mm; the size of the hollow opening 4 in the high compressive rigidity requirement zone 7 is less than the first threshold and greater than the second threshold, which is 0.006 mm; the size of the hollow opening 4 in the structural balance requirement zone 8 is less than or equal to the second threshold.
[0026] In this embodiment, the size of the hollow opening 4 in the high tensile fatigue demand zone 6 is 0.02mm, the arrangement density of the reinforcing wire 5 in the high tensile fatigue demand zone 6 is 35 wires / mm, and the reinforcing wire 5 is made of a high-strength material, specifically tungsten steel wire; The size of the hollow opening 4 in the high compressive rigidity requirement zone 7 is 0.01mm. The arrangement density of the reinforcing wire 5 in the high compressive rigidity requirement zone 7 is 12 wires / mm. The reinforcing wire 5 is made of a high rigidity material, specifically stainless steel wire. There is no hollow opening 4 in the structural balance requirement area 8, and no reinforcing wire 5 is provided in the structural balance requirement area 8; in other embodiments, the arrangement density of reinforcing wire 5 in the structural balance requirement area 8 is 1 wire / mm, and the reinforcing wire 5 is made of low-cost material, specifically copper-plated steel wire.
[0027] All reinforcing filaments 5 have the same diameter of 0.01mm. All reinforcing filaments 5 use a uniform wire diameter and are integrally formed with the intermediate layer, ensuring the overall flatness of the screen printing surface and not affecting the accuracy of the printed pattern and the efficiency of ink transfer.
[0028] In the composite mesh, a transition zone 9 is provided between any two adjacent regions in the high tensile fatigue requirement zone 6, the high compressive rigidity requirement zone 7, and the structural balance requirement zone 8. The arrangement density of the reinforcing wires 5 in the transition zone 9 gradually changes linearly to both sides along the boundary line between the two adjacent regions. The gradual change range covers the arrangement density range of the two adjacent reinforcing parts, avoiding stress abrupt changes between different regions, improving fatigue life, and effectively reducing cracking at the boundary between adjacent regions.
[0029] The outer surface of the top layer 3 away from the middle composite layer 2 is provided with a ceramic coating (not shown in the figure). The ceramic coating is made of alumina ceramic or zirconium oxide ceramic, with a coating thickness of 0.002 mm. It is formed by plasma spraying process to improve the compressive strength and wear resistance of the top layer 3.
[0030] Example 2 A processing method for the above-mentioned composite screen printing plate includes the following steps: S1. Obtain the target pattern data of the screen printing plate, and divide the screen printing plate pattern area into a high tensile fatigue requirement area 6, a high extrusion rigidity requirement area 7, a structural balance requirement area 8 and a transition area 9 according to the preset first threshold and second threshold. S2. Based on the dominant mechanical requirements of each region, a differentiated reinforcement wire 5 configuration scheme is formulated: for the high tensile fatigue requirement zone 6, a first high-strength material and 35 wires / mm of reinforcement wire 5 are specified; for the high compressive rigidity requirement zone 7, a second high-rigidity material and 12 wires / mm of reinforcement wire 5 are specified; for the structural balance requirement zone 8, a third low-cost material and 1 wire / mm of reinforcement wire 5 or no reinforcement configuration are specified. The range of the transition zone 9, the starting / ending value of the density gradient and the gradient slope are also specified (for example, the width of the transition zone 9 between the high tensile and compressive zones is 50μm, and the density linearly decreases from 35 wires / mm to 12 wires / mm). S3. Preparation of the bottom layer 1: Select nickel sheet, stainless steel or PI film as raw materials, process to form a preset fine pattern and hollow opening 4, and control the single layer thickness of the bottom layer 1 to be 0.003-0.02mm; S4. Preparation of intermediate composite layer 2: S41. Prepare the main layer by selecting a PI film and processing it to form a pattern corresponding to the hollowed-out opening 4 of the bottom layer 1; S42. Based on the configuration scheme in step S2, a precision wire placement device is used to differentially place reinforcing wires 5 of corresponding materials and densities in the corresponding areas of the main body layer. The precision wire placement device identifies its processing position on the screen in real time through visual positioning / laser positioning. When the equipment enters the transition zone 9, the control system adjusts the yarn feeding speed, needle movement speed or needle spacing in real time according to the preset gradual parameters to achieve a continuous gradual change in the density of the reinforcing yarn 5. When the equipment leaves the transition zone 9 and enters the fixed density zone (such as the high compression resistance zone), it immediately returns to the static filament laying fixed parameters to ensure uniform density in the fixed zone. S43. By coating with high-temperature resistant PI adhesive and curing at 180-220℃, the reinforcing wire 5 is integrally fixed with the main body layer, forming an intermediate composite layer 2 in which the reinforcing wire 5 is completely covered; S5. Composite base layer 1 and intermediate composite layer 2: High-temperature resistant PI adhesive is used to bond and fix the base layer 1 and the intermediate composite layer 2 to form a preliminary composite; S6. Preparation and composite of top layer 3: Select nickel sheet to process into a reinforcement pattern, and coat its surface with a ceramic coating through plasma spraying process. Then cover it on the upper surface of the middle composite layer 2, and combine it with the preliminary composite body into an integrated three-layer structure through PI adhesive bonding or laser spot welding process. S7. Perform flatness correction, dimensional accuracy inspection and mechanical property testing on the composite screen to obtain the finished composite screen.
[0031] The specific embodiments are merely illustrative of the present invention and are not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.
Claims
1. A reinforced wire composite screen based on regional stress requirements, comprising a bottom layer (1), a middle composite layer (2), and a top layer (3), wherein the composite screen has a plurality of perforated openings (4), characterized in that: The intermediate composite layer (2) is provided with a number of reinforcing wires (5) passing through the hollow opening (4). The composite screen is formed with a high tensile fatigue requirement area (6), a high extrusion rigidity requirement area (7) and a structural balance requirement area (8) corresponding to the width of the hollow opening (4). The arrangement density or strength of the reinforcing wires (5) in the high tensile fatigue requirement area (6), the high extrusion rigidity requirement area (7) and the structural balance requirement area (8) increases as the width of the hollow opening (4) increases.
2. The reinforced wire composite screen according to claim 1, characterized in that: The reinforcing wire (5) is arranged along the length extension direction perpendicular to the hollow opening (4).
3. The reinforced wire composite screen according to the difference in regional stress requirements as described in claim 2, characterized in that: The size of the hollow opening (4) in the high tensile fatigue requirement zone (6) is ≥ the first threshold; the size of the hollow opening (4) in the high compressive rigidity requirement zone (7) is < the first threshold and > the second threshold; the size of the hollow opening (4) in the structural balance requirement zone (8) is ≤ the second threshold.
4. The reinforced wire composite mesh according to the difference in regional stress requirements as described in claim 3, characterized in that: The first threshold is 0.015 mm, the arrangement density of reinforcing wires (5) in the high tensile fatigue demand zone (6) is 30-40 wires / mm, the second threshold is 0.006 mm, the arrangement density of reinforcing wires (5) in the high extrusion rigidity demand zone (7) is 10-20 wires / mm, and the arrangement density of reinforcing wires (5) in the structural balance demand zone (8) is 0-3 wires / mm.
5. A reinforced wire composite mesh according to the difference in regional stress requirements as described in claim 4, characterized in that: The reinforcing wire (5) in the high tensile fatigue requirement zone (6) is made of high-strength material, preferably tungsten steel wire; the reinforcing wire (5) in the high compressive rigidity requirement zone (7) is made of high-rigidity material, preferably stainless steel wire; the reinforcing wire (5) in the structural balance requirement zone (8) is made of low-cost material or omitted, preferably copper-plated steel wire.
6. A reinforced wire composite mesh according to the difference in regional stress requirements as described in claim 1, characterized in that: All the reinforcing wires (5) have the same diameter, which is 0.005-0.02 mm.
7. A reinforced wire composite screen according to the difference in regional stress requirements as described in claim 1, characterized in that: In the composite mesh, a transition zone (9) is provided between any two adjacent regions in the high tensile fatigue requirement zone (6), the high extrusion rigidity requirement zone (7), and the structural balance requirement zone (8). The arrangement density of the reinforcing wires (5) in the transition zone (9) gradually changes linearly to both sides along the boundary line between the two adjacent regions, and the gradual change range covers the arrangement density range of the two adjacent reinforcing parts.
8. A reinforced wire composite screen according to the difference in regional stress requirements as described in claim 1, characterized in that: The outer surface of the top layer (3) away from the intermediate composite layer (2) is provided with a ceramic coating. The material of the ceramic coating is alumina ceramic or zirconium oxide ceramic, the coating thickness is 0.001-0.003mm, and it is formed by plasma spraying process to improve the compressive strength and wear resistance of the top layer (3).
9. A method for processing a composite screen printing plate according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Obtain the target pattern data of the screen printing plate, and divide the screen printing plate pattern area into a high tensile fatigue requirement area (6), a high extrusion rigidity requirement area (7), and a structural balance requirement area (8) according to the preset first threshold and second threshold. S2. Based on the dominant mechanical requirements of each region, formulate a differentiated reinforcement wire (5) configuration scheme: for the high tensile fatigue requirement area (6), specify the first high strength material and 35-40 reinforcement wires / mm (5); for the high extrusion rigidity requirement area (7), specify the second high rigidity material and 10-20 reinforcement wires / mm (5); for the structural balance requirement area (8), specify the third low cost material and 1-3 reinforcement wires / mm (5) or no reinforcement configuration. S3. Preparation of the bottom layer (1): Select nickel sheet, stainless steel or PI film as raw materials, process to form hollow openings (4), and control the thickness of the single layer of the bottom layer (1) to be 0.003-0.02mm; S4. Preparation of intermediate composite layer (2): S41. Prepare the main layer by selecting a PI film to form a pattern corresponding to the hollow opening (4) of the bottom layer (1); S42. Based on the configuration scheme of step S2, use a precision filament laying device to lay reinforcing filaments of different materials and densities in the corresponding areas of the main body layer (5). S43. By coating with high-temperature resistant PI adhesive and curing at 180-220℃, the reinforcing wire (5) is fixed to the main body layer in an integrated manner, forming an intermediate composite layer (2) in which the reinforcing wire (5) is completely covered. S5. Composite bottom layer (1) and intermediate composite layer (2): The bottom layer (1) and intermediate composite layer (2) are bonded and fixed with high temperature resistant PI adhesive to form a preliminary composite; S6. Prepare the top layer (3) reinforcement layer and composite it: Select a nickel sheet to process and form a hollow opening (4) corresponding to the hollow opening (4) of the bottom layer (1), and coat it with a ceramic coating through plasma spraying process, and then cover it on the upper surface of the middle composite layer (2), and combine it with the preliminary composite body into an integrated three-layer structure through PI adhesive bonding or laser spot welding process. S7. Perform flatness correction, dimensional accuracy inspection and mechanical property testing on the composite screen to obtain the finished composite screen.
10. A composite screen printing method according to claim 9, characterized in that: In step S2, the range of the transition region (9), the starting / ending value of the density gradient, and the gradient slope are determined. When the equipment enters the transition zone (9), the control system adjusts the wire feeding speed, needle movement speed or needle spacing in real time according to the preset gradual parameters to achieve a continuous gradual change in the density of the reinforcing filament (5). When the equipment leaves the transition zone (9) and enters the fixed density zone, it immediately returns to the fixed parameters of static fiber laying.