Search

CN-121973543-A - Reinforced silk composite screen plate according to regional stress demand difference and processing method thereof

CN121973543ACN 121973543 ACN121973543 ACN 121973543ACN-121973543-A

Abstract

The invention discloses a reinforced silk composite screen plate according to the difference of regional stress demands and a processing method thereof, which relate to the field of composite screen plates and have the technical scheme that: including bottom, middle composite bed and top layer, a plurality of fretwork openings have been seted up to the compound half tone, be provided with a plurality of reinforcing wires that pass the fretwork opening in the middle composite bed, compound half tone corresponds fretwork open-ended width dimension and is formed with high tensile fatigue demand district, high anti extrusion rigidity demand district and the balanced demand district of structure, high tensile fatigue demand district, high anti extrusion rigidity demand district and the balanced demand district of structure in reinforcing wire arrange density or intensity according to fretwork open-ended width dimension increase and increase. The invention aims to provide a reinforced silk composite screen plate according to the difference of regional stress demands and a processing method thereof.

Inventors

  • ZHANG ZHENGGUO
  • ZHANG XING

Assignees

  • 浙江硕克科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (10)

  1. 1. The reinforced silk composite screen plate comprises a bottom layer (1), a middle composite layer (2) and a top layer (3), wherein a plurality of hollowed-out openings (4) are formed in the composite screen plate, and the reinforced silk composite screen plate is characterized in that a plurality of reinforced silk (5) penetrating through the hollowed-out openings (4) are arranged in the middle composite layer (2), a high tensile fatigue demand area (6), a high extrusion rigidity demand area (7) and a structural balance demand area (8) are formed in the composite screen plate corresponding to the width size of the hollowed-out openings (4), and the arrangement density or strength of the reinforced silk (5) in the high tensile fatigue demand area (6), the high extrusion rigidity demand area (7) and the structural balance demand area (8) is increased according to the increase of the width size of the hollowed-out openings (4).
  2. 2. The reinforced silk composite screen plate according to the difference of regional stress requirements, as set forth in claim 1, wherein the reinforced silk (5) is arranged along the length extending direction perpendicular to the hollowed-out opening (4).
  3. 3. The reinforced silk composite screen plate according to the regional stress demand difference, which is disclosed in claim 2, is characterized in that the size of the hollowed-out opening (4) in the high tensile fatigue demand region (6) is larger than or equal to a first threshold value, the size of the hollowed-out opening (4) in the high extrusion rigidity demand region (7) is smaller than the first threshold value and larger than a second threshold value, and the size of the hollowed-out opening (4) in the structural balance demand region (8) is smaller than or equal to the second threshold value.
  4. 4. The reinforced silk composite screen plate according to the difference of regional stress demands, as set forth in claim 3, wherein the first threshold value is 0.015mm, the arrangement density of the reinforced silk (5) in the high tensile fatigue demand region (6) is 30-40 pieces/mm, the second threshold value is 0.006mm, the arrangement density of the reinforced silk (5) in the high compressive rigidity demand region (7) is 10-20 pieces/mm, and the arrangement density of the reinforced silk (5) in the structural balance demand region (8) is 0-3 pieces/mm.
  5. 5. The reinforced wire composite screen printing plate according to the difference of stress requirements of the areas, which is described in claim 4, is characterized in that the reinforced wires (5) in the areas (6) with high tensile fatigue requirements are made of high-strength materials, preferably tungsten steel wires, the reinforced wires (5) in the areas (7) with high extrusion rigidity requirements are made of high-rigidity materials, preferably stainless steel wires, and the reinforced wires (5) in the areas (8) with structural balance requirements are made of low-cost materials or omitted, preferably copper-plated steel wires.
  6. 6. A reinforcing wire composite screen according to claim 1, wherein the diameters of all the reinforcing wires (5) are the same and are 0.005-0.02mm.
  7. 7. The reinforced silk composite screen plate according to the area stress demand difference of claim 1, wherein a transition area (9) is arranged between any two adjacent areas in the high tensile fatigue demand area (6), the high extrusion rigidity demand area (7) and the structural balance demand area (8), the arrangement density of the reinforced silk (5) in the transition area (9) is gradually changed in a linear gradient manner along the boundary line of the two adjacent areas to two sides, and the gradual change range covers the arrangement density interval of the two adjacent reinforced parts.
  8. 8. The reinforced silk composite screen plate according to the difference of regional stress requirements, as set forth in claim 1, characterized in that the outer surface of the top layer (3) far away from the middle composite layer (2) is provided with a ceramic coating, the ceramic coating is made of alumina ceramic or zirconia ceramic, the thickness of the coating is 0.001-0.003mm, and the coating is formed by coating through a plasma spraying process, so that the compressive strength and the wear resistance of the top layer (3) are improved.
  9. 9. A method of processing a composite screen according to any one of claims 1 to 8, comprising the steps of: S1, acquiring target pattern data of a screen printing plate, and dividing a screen printing plate pattern area into a high tensile fatigue demand area (6), a high extrusion rigidity demand area (7) and a structure balance demand area (8) according to a preset first threshold value and a preset second threshold value; S2, based on dominant mechanical requirements of all areas, formulating a differential reinforcing wire (5) configuration scheme, namely, designating a first high-strength material and 35-40 reinforcing wires (5) per mm for a high-tensile fatigue requirement area (6), designating a second high-rigidity material and 10-20 reinforcing wires (5) per mm for a high-extrusion rigidity requirement area (7), and designating a third low-cost material and 1-3 reinforcing wires (5) per mm or non-reinforcing configuration for a structural balance requirement area (8); S3, preparing a bottom layer (1), namely selecting nickel sheets, stainless steel or PI films as raw materials, processing to form hollowed-out openings (4), and controlling the single-layer thickness of the bottom layer (1) to be 0.003-0.02mm; S4, preparing an intermediate composite layer (2): s41, preparing a main body layer, and selecting a PI film to process to form a pattern corresponding to the hollowed-out opening (4) of the bottom layer (1); s42, according to the configuration scheme of the step S2, adopting precise wire laying equipment to differentially lay reinforcing wires (5) with corresponding materials and densities in the corresponding areas of the main body layer; S43, integrally fixing the reinforcing wires (5) and the main body layer by coating high-temperature-resistant PI glue and curing at 180-220 ℃ to form an intermediate composite layer (2) in which the reinforcing wires (5) are completely coated; S5, compounding the bottom layer (1) and the middle composite layer (2), wherein the bottom layer (1) and the middle composite layer (2) are bonded and fixed by adopting high temperature resistant PI adhesive to form a primary composite; S6, preparing a top layer (3) reinforcing layer and compounding, namely selecting a nickel sheet to process to form a hollowed-out opening (4) corresponding to the hollowed-out opening (4) of the bottom layer (1), coating the surface of the nickel sheet to form a ceramic coating by a plasma spraying process, covering the ceramic coating on the upper surface of the middle composite layer (2), and compounding the ceramic coating with a primary composite body by a PI adhesive bonding or laser spot welding process to form an integrated three-layer structure; s7, performing flatness correction, dimensional accuracy detection and mechanical property test on the compounded screen plate to obtain a finished product of the compound screen plate.
  10. 10. The method for processing the composite screen printing plate according to claim 9, wherein the method comprises the following steps of: in the step S2, the range of the transition zone (9), the start value/end value of the density gradient and the gradient slope are calibrated, When the equipment enters the transition zone (9), the control system adjusts the wire running speed, the needle moving speed or the needle spacing of the laid wires in real time according to preset gradual change parameters, so as to realize continuous gradual change of the arrangement density of the reinforced wires (5); When the device leaves the transition zone (9) and enters a fixed density zone, the device immediately returns to a fixed parameter of static laying.

Description

Reinforced silk composite screen plate according to regional stress demand difference and processing method thereof Technical Field The invention relates to the technical field of composite screen printing plates, in particular to a reinforced silk composite screen printing plate according to the difference of regional stress demands and a processing method thereof. Background In the field of fine printing, in order to improve the fatigue resistance of a metal screen plate in long-term use, a reinforcing wire or a similar reinforcing structure is usually arranged in a local key area (such as a connecting line with a larger span) of the screen plate in the prior art, and the mechanical strength of a specific area is improved in a local material adding mode. However, such prior art solutions have a common disadvantage in that they generally treat the area to be reinforced as a whole and employ a uniform reinforcing strategy within this area, i.e. reinforcing filaments of the same material, of the same diameter, of the same arrangement density. The actual pattern of the screen is complex and varied, even in the same localized area to be reinforced, from large-size opening edges to small-size openings, and even different portions of solid connecting lines. These different parts are subject to significant differences in the stress levels and dominant failure modes in actual printing: the edges of the large openings are mainly subjected to high-cycle tensile stress, fatigue fracture is easy to occur, the structures of the fine grid lines/small opening areas are fragile, the main threat is local extrusion plastic deformation caused by foreign body blocking, permanent damage is caused, and the solid areas are mainly supported and pressed, so that the strength of the solid areas is high. The uniform enhancement mode of 'one-cut' is adopted, so that the mechanical requirements of the differentiation cannot be met at the same time. This may lead to insufficient enhancement of the high risk area, redundancy of the low risk area material, failure to achieve cost optimization while ensuring reliability, and failure to provide effective prevention against microscopic damage caused by foreign object jamming. Therefore, there is a need for a screen plate reinforcing technology, which can perform differential design on the material performance and arrangement structure of reinforcing wires according to the dominant stress requirements (tensile fatigue requirements, extrusion resistance rigidity requirements and structure balance requirements) of different areas, so as to realize the unification of macroscopic fatigue resistance and microscopic damage resistance. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a reinforced silk composite screen plate according to the difference of regional stress demands and a processing method thereof. The technical aim of the invention is achieved through the following technical scheme that the reinforced silk composite screen plate comprises a bottom layer, a middle composite layer and a top layer, wherein the composite screen plate is provided with a plurality of hollowed-out openings, a plurality of reinforced silk penetrating through the hollowed-out openings is arranged in the middle composite layer, a high tensile fatigue demand area, a high extrusion rigidity demand area and a structure balance demand area are formed in the composite screen plate corresponding to the width dimension of the hollowed-out openings, and the arrangement density or strength of the reinforced silk in the high tensile fatigue demand area, the high extrusion rigidity demand area and the structure balance demand area is increased according to the increase of the width dimension of the hollowed-out openings. The invention further provides that the reinforcing wires are arranged along the length extending direction perpendicular to the hollowed-out opening. The invention further provides that the size of the hollowed-out opening in the high-tensile fatigue demand area is larger than or equal to a first threshold value, the size of the hollowed-out opening in the high-compressive rigidity demand area is smaller than the first threshold value and larger than a second threshold value, and the size of the hollowed-out opening in the structure balance demand area is smaller than or equal to the second threshold value. The invention is further arranged that the first threshold value is 0.015mm, the arrangement density of the reinforcing wires in the high tensile fatigue demand area is 30-40 pieces/mm, the second threshold value is 0.006mm, the arrangement density of the reinforcing wires in the high extrusion resistance rigidity demand area is 10-20 pieces/mm, and the arrangement density of the reinforcing wires in the structural balance demand area is 0-3 pieces/mm. . The invention further provides that the reinforcing wires in the high-tensile fatigue demand are