Flocking dustproof and anti-blocking grid sand and manufacturing method thereof

Abstract

The invention relates to flocking dustproof and anti-blocking grid sand and a manufacturing method thereof, and belongs to the technical field of grinding tools. The flocked dustproof and anti-blocking grid sand comprises a base layer, a flocked layer and an anti-blocking layer, the grid framework layer is adhered to the bottom surface of the base layer in a hot pressing manner; the flocking layer is attached to the non-overlapped bottom surfaces of the base layer and the grid framework layer through an electrostatic adsorption process; the abrasive material layer is adhered to the bottom surface of the flocking layer; the base layer comprises a hollow polymer foam layer, and the grid framework layer is bonded to the bottom face of the base layer in a hot pressing mode. The Y-shaped notch of the base layer and the cavity structure effectively homogenize and buffer the grinding pressure through local self-adaptive deformation, so that the grinding material layer can be tightly attached to the concave-convex curved surface, and the problems of uneven grinding and rapid blockage of the grinding material layer due to the fact that the base material cannot adapt to local pressure change during manual grinding are solved.

Description

Technical Field

[0001] This invention relates to the field of abrasive tools, and in particular to a flocked, dustproof, and anti-clogging mesh abrasive and its manufacturing method. Background Technology

[0002] Flocked mesh abrasive is an innovative type of coated abrasive that uses a soft mesh substrate and electrostatic flocking technology to ensure a vertical and uniform distribution of abrasive particles. Its core advantages lie in its superior anti-clogging and dust removal performance, combined with excellent elasticity and heat dissipation, enabling more efficient and durable sanding. It excels at handling curved surfaces, achieving a fine and uniform surface finish, and is widely applicable in automotive repair, high-end woodworking, and metal surface treatment.

[0003] When manually sanding uneven surfaces, flocked mesh abrasive often results in uneven sanding and rapid clogging of the abrasive layer because the substrate cannot adapt to local pressure changes. To address this, this invention solves the aforementioned problems by incorporating deformable micro-structural units on the substrate, allowing for localized adaptive deformation during sanding to even out pressure. Summary of the Invention

[0004] Therefore, it is necessary to provide a flocked dustproof and anti-clogging mesh abrasive and its manufacturing method to address the problem of uneven grinding and abrasive layer blockage caused by the substrate's inability to adapt to local pressure changes when manually grinding uneven surfaces.

[0005] A flocked dustproof and anti-clogging mesh sand, including:

[0006] grassroots level;

[0007] A mesh skeleton layer, which is hot-pressed and bonded to the bottom surface of the base layer;

[0008] A flocked layer is attached to the bottom surface of the base layer and the grid skeleton layer, which do not overlap, by an electrostatic adsorption process.

[0009] An abrasive layer is bonded to the bottom surface of the flocked layer.

[0010] In one embodiment, the base layer includes a hollow polymer foam layer, the grid skeleton layer is hot-pressed and bonded to the bottom surface of the base layer, the hollow polymer foam layer and the grid skeleton layer form cavities at their intersecting positions, the top surface of the hollow polymer foam layer has a cut, the cut extends downward through the adjacent cavity, and the cut is Y-shaped.

[0011] In one embodiment, a padding layer is hot-pressed to the top surface of the base layer, and the top surface of the padding layer has rectangular holes that are evenly distributed and staggered with the cuts.

[0012] In one embodiment, the padding layer is a foam double-sided adhesive material component, and the top surface of the padding layer is covered with release paper.

[0013] In one embodiment, the mesh skeleton layer is a modified PP material component, the flocking layer is a nylon flocking material component, and the abrasive layer is a silicon carbide or alumina material component.

[0014] In one embodiment, the hollow polymer foam layer has a thickness of 1.0-1.5 mm, the mesh size of the mesh skeleton layer is 0.5-2.0 mm, the flock length of the flock layer is 0.3-0.8 mm, the particle size of the abrasive layer is 600-800 mesh, and the thickness of the padding layer is 1.0-1.5 mm.

[0015] A method for manufacturing flocked dustproof and anti-clogging mesh sand, the method of manufacturing the flocked dustproof and anti-clogging mesh sand is as follows:

[0016] Step 1 Substrate Pretreatment: The substrate is pretreated and a cavity structure is formed by hot pressing and fusion.

[0017] Step 2 Composite layer bonding: The composite mesh skeleton layer and the padding layer are bonded together on both sides of the base layer and cured.

[0018] Step 3: Cutting: Make a Y-shaped cut on the top surface of the base layer to penetrate the cavity;

[0019] Step 4: Electrostatic flocking: A flocking layer is attached to the bottom surface of the composite structure using an electrostatic adsorption process and then dried and cured.

[0020] Step 5: Applying the abrasive layer: Apply the abrasive layer to the bottom surface of the flocked layer and cure it firmly in a stepped manner;

[0021] Step 6: Cutting and trimming: Cut and trim the edges to obtain the finished product.

[0022] In one embodiment, the detailed process of step 1 is as follows:

[0023] Step 1.1 Hot pressing of foam layer: Place the concave parts of two wavy hollow polymer foam materials opposite each other, fix the corners by hot pressing to form a hollow polymer foam layer and initially construct the cavity;

[0024] Step 1.2 Adhesive application and layer placement: Then, apply water-based adhesive evenly to both sides of the pretreated base layer, place the mesh skeleton layer on the bottom surface of the base layer, and place the padding layer on the top surface of the base layer;

[0025] Step 1.3 Pressure curing: Apply 0.3-0.5MPa pressure at 60-80℃ for 20-40 minutes to cure firmly, so that the mesh skeleton layer and the padding layer are firmly bonded and the cavity is finally formed;

[0026] In one embodiment, step 1.4 requires processing a Y-shaped cut on the top surface of the composite base layer by an interlaced stamping process. The cut penetrates the adjacent cavity downwards, ensuring that the cut shape is evenly distributed and interlaced with the rectangular holes of the pad layer. During the processing, the stamping depth and position need to be controlled to avoid damaging the grid skeleton layer and the cavity structure.

[0027] In one embodiment, the detailed process of step 4 is as follows:

[0028] Step 4.1 Electrostatic flocking operation: Electrostatic flocking is performed on the composite base layer and grid skeleton layer structure. An electrostatic generator is used to adsorb nylon flock material onto the non-overlapping bottom surfaces of the base layer and grid skeleton layer, covering the surface and hole walls to form a flock layer.

[0029] Step 4.2 Drying and curing: After flocking, dry and cure at 110-130℃ for 30-50 minutes to ensure that the flocking fibers adhere firmly and that the flocked layer is evenly distributed and has good adsorption properties.

[0030] In one embodiment, the detailed process of step 5 is as follows:

[0031] Step 5.1 Abrasive coating: Apply resin adhesive to the bottom surface of the flocked layer, and evenly spread silicon carbide or alumina abrasive to form an abrasive layer;

[0032] Step 5.2 Step curing: Then pre-cur at 90-110℃ for 15-25 minutes, and then raise the temperature to 140-160℃ for 40-60 minutes to fully cure, so that the abrasive layer is firmly bonded.

[0033] 1. The above-mentioned flocked dustproof and anti-clogging mesh sand and its manufacturing method, the Y-shaped cut and cavity structure of the base layer effectively homogenize and buffer the grinding pressure through local adaptive deformation, so that the abrasive layer can closely fit the concave and convex surface, and solve the problem of uneven grinding and rapid clogging of the abrasive layer caused by the substrate's inability to adapt to local pressure changes during manual grinding.

[0034] 2. The cavity structure of the base layer generates negative pressure when the pressure is released and the material returns to its original state. This negative pressure attracts and adsorbs dust on the surface of the abrasive layer, effectively reducing dust diffusion. Combined with the enhanced air permeability of the Y-shaped cut, this effectively suppresses dust, reduces environmental pollution, and improves the cleanliness of the operating environment. The Y-shaped cut and cavity structure of the base layer together improve overall air permeability, effectively promoting the dissipation of grinding heat, reducing the risk of overheating and cooling energy consumption. At the same time, by reducing the damage to materials caused by heat accumulation, the product's service life is extended, and resources are saved.

[0035] 3. The flocked layer effectively blocks dust from entering the mesh pores through a dense barrier, significantly reducing the clogging rate, extending product lifespan, and reducing waste generation. At the same time, its buffering effect reduces the impact between the abrasive and the workpiece, improves grinding accuracy, reduces energy consumption, and solves the problem of decreased efficiency and frequent replacement of the abrasive layer due to dust accumulation. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention in a flat state;

[0038] Figure 2 This is a cross-sectional view of the overall structure of the present invention in a flat state;

[0039] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0040] Figure 4 This is an exploded view of the overall structure of the present invention in a flat state.

[0041] Figure 5 This is a schematic diagram of the overall structure of the present invention being in a convex state;

[0042] Figure 6 This is a schematic diagram of the overall structure of the present invention being in a concave state;

[0043] Figure 7 This is a schematic diagram of the steps involved in the fabrication of the overall structure in this invention.

[0044] Figure label:

[0045] 100, Base layer; 110, Hollow polymer foam layer; 111, Cavity; 112, Cutout; 200, Grid skeleton layer; 300, Flocking layer; 400, Abrasive layer; 500, Pad layer; 510, Rectangular hole. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0051] The following is combined with Figure 1 - Figure 7 This invention describes the flocked dustproof and anti-clogging mesh sand and its manufacturing method.

[0052] In one embodiment, a flocked dustproof and anti-clogging mesh sand includes: a base layer 100, a mesh skeleton layer 200, a flocked layer 300, and an abrasive layer 400.

[0053] like Figure 1-6 As shown, the base layer 100 includes a hollow polymer foam layer 110 with a thickness of 1.0-1.5 mm. Cavities 111 are formed at the intersections of the hollow polymer foam layer 110 and the mesh skeleton layer 200. A cutout 112 is provided on the top surface of the hollow polymer foam layer 110, extending downwards through the adjacent cavity 111. The cutout 112 is Y-shaped. The Y-shaped cutout 112 significantly increases the air permeability of the sandpaper, effectively reducing the probability of overheating during grinding, thereby reducing cooling energy consumption. Simultaneously, it enhances flexibility, making it more conform to the processing surface to reduce grinding resistance. When grinding protruding areas, it reduces resistance and wear. When grinding concave areas, the material can be expanded towards the concave area to improve the grinding effect; its breathable structure also plays a role in dust collection, effectively suppressing dust diffusion and reducing environmental pollution; during maintenance, the cut 112 can be opened by bending the back side, facilitating efficient dust removal and cleaning, reducing resource consumption. At the same time, the cavity 111 structure of the base layer 100 is compressed when under pressure and returns to its original shape when the pressure is released, generating negative pressure, which forms a traction and adsorption effect on the dust on the surface of the abrasive layer 400, effectively suppressing dust diffusion; combined with its breathable characteristics, it promotes heat dissipation, significantly reducing the risk of overheating during grinding and reducing cooling energy consumption; during maintenance, the structural deformation facilitates cleaning, extends the product's service life, and reduces resource consumption and environmental pollution.

[0054] like Figure 1-4 As shown, the mesh skeleton layer 200 is hot-pressed and bonded to the bottom surface of the base layer 100; the mesh skeleton layer 200 is a modified PP material component with a mesh aperture of 0.5-2.0mm, which provides solid support for the whole, while enhancing breathability and flexibility, helping to reduce dust emissions and heat dissipation, and optimizing energy utilization.

[0055] like Figure 1-4 As shown, the flocked layer 300 is attached to the non-overlapping bottom surfaces of the base layer 100 and the mesh skeleton layer 200 via electrostatic adsorption. The flocked layer 300 is a nylon flock material component, and the dense barrier it forms can effectively block dust from entering the mesh pores, significantly reducing the clogging rate, extending the product's service life, and reducing waste generation. By reducing the impact of dust accumulation on the abrasive, the durability of the product is significantly improved. Its buffering effect can also reduce the impact between the abrasive and the workpiece, improving the precision of the grinding surface.

[0056] like Figure 1-4As shown, the abrasive layer 400 is bonded to the bottom surface of the flocked layer 300; the abrasive layer 400 is a silicon carbide or alumina material component with a particle size of 600-800 mesh, providing uniform and efficient grinding capability. When combined with the flocked layer 300, it can reduce clogging, maintain the sharpness of the abrasive, and reduce the replacement frequency.

[0057] like Figure 1-6 As shown, a padding layer 500 is hot-pressed and bonded to the top surface of the base layer 100. The padding layer 500 has a thickness of 1.0-1.5mm. The top surface of the padding layer 500 has evenly distributed rectangular holes 510 that are staggered with the cuts 112. The padding layer 500 is a foam double-sided adhesive material component. Its rectangular holes 510 can limit the tearing and expansion of the cuts 112 during use, ensuring normal use of the product. At the same time, it provides the necessary expansion space for the cuts 112 to ensure normal opening. The grid design can also reduce material usage and save resources. The top surface of the padding layer 500 is covered with release paper.

[0058] like Figure 1-7 As shown, a method for manufacturing flocked dustproof and anti-clogging mesh sand is described below:

[0059] Step 1 Substrate pretreatment: The base layer 100 is pretreated and the cavity 111 structure is formed by hot pressing and fusion.

[0060] Step 1.1 Hot pressing of foam layer: Place the concave parts of two wavy hollow polymer foam materials opposite each other, fix the corners by hot pressing and fusion treatment to form hollow polymer foam layer 110 and initially construct cavity 111;

[0061] Step 1.2 Adhesive application and layer placement: Subsequently, water-based adhesive is evenly applied to both sides of the pretreated base layer 100, and the mesh skeleton layer 200 is placed on the bottom surface of the base layer 100, and the padding layer 500 is placed on the top surface of the base layer 100.

[0062] Step 1.3 Pressure curing: Apply 0.3-0.5MPa pressure at 60-80℃ for 20-40 minutes to cure firmly, so that the mesh skeleton layer 200 and the pad layer 500 are firmly bonded together, and finally form the cavity 111;

[0063] Step 2 Composite layer bonding: Composite mesh skeleton layer 200 and pad layer 500 are bonded on both sides of the base layer 100 and cured.

[0064] Step 3: Processing of cut 112: Process a Y-shaped cut 112 through the cavity 111 on the top surface of the base layer 100. The specific steps are as follows: On the top surface of the composite base layer 100, process a Y-shaped cut 112 by staggered stamping. The cut 112 penetrates the adjacent cavity 111 downwards. It should be noted that during the processing, it is necessary to ensure that the shape of the cut 112 is evenly distributed and staggered with the rectangular hole 510 of the pad layer 500. During the processing, the stamping depth and position need to be controlled to avoid damaging the mesh skeleton layer 200 and the cavity 111 structure.

[0065] Step 4: Electrostatic flocking: A flocking layer of 300 mm is attached to the bottom surface of the composite structure using an electrostatic adsorption process and then dried and cured.

[0066] Step 4.1 Electrostatic flocking operation: Electrostatic flocking is performed on the composite base layer 100 and mesh skeleton layer 200 structure. An electrostatic generator is used to adsorb nylon flock material onto the non-overlapping bottom surfaces of the base layer 100 and mesh skeleton layer 200, covering the surface and hole walls to form flock layer 300.

[0067] Step 4.2 Drying and curing: After flocking, dry and cure at 110-130℃ for 30-50 minutes to ensure that the flocking fibers are firmly attached and that the flocked layer is evenly distributed and has good adsorption properties.

[0068] Step 5 Abrasive application: Apply abrasive layer 400 to the bottom surface of flocked layer 300 and cure it firmly in a stepped manner;

[0069] Step 5.1 Abrasive coating: Apply resin adhesive to the bottom surface of the flocked layer 300, and evenly spread silicon carbide or alumina abrasive to form the abrasive layer 400.

[0070] Step 5.2 Step curing: Then pre-cur at 90-110℃ for 15-25 minutes, and then raise the temperature to 140-160℃ for 40-60 minutes to fully cure, so that the abrasive layer 400 is firmly bonded.

[0071] Step 6: Cutting and trimming: Cut and trim the edges to obtain the finished product.

[0072] Working principle: When the mesh sander is used by hand or installed on the sanding equipment via double-sided tape on the foam padding layer 500, the process is convenient and the fixation is reliable. This design enables the sanding pressure to be transmitted evenly. Combined with the Y-shaped cut 112 structure of the base layer 100, it effectively increases the overall flexibility and breathability, thereby reducing the risk of overheating and energy loss during the sanding process. The flocked layer 300 also significantly suppresses dust flying by utilizing its barrier effect, improving the cleanliness of the operating environment and reducing environmental pollution.

[0073] When the mesh abrasive is used on a flat surface, the abrasive layer 400 provides a stable and uniform grinding effect. At this time, the flocked layer 300 not only effectively prevents grinding debris from penetrating and clogging the pores of the mesh skeleton layer 200, but its buffering properties also ensure smooth contact between the abrasive layer 400 and the workpiece, thereby obtaining more consistent grinding accuracy and extending the product service life.

[0074] When the mesh abrasive is applied to an uneven processing surface, the hollow polymer foam layer 110 and cavity 111 structure of the base layer 100 will undergo adaptive deformation under pressure, and the Y-shaped cut 112 on its top surface will further expand or contract. This characteristic allows the abrasive layer 400 to fit tightly into curved surfaces and grooves, significantly improving the grinding effect and efficiency of such complex surfaces, avoiding excessive wear caused by excessive local pressure, and thus reducing material waste.

[0075] During routine maintenance of the mesh sand, the Y-shaped cut 112 of the base layer 100 can be opened by slightly bending the back of the product, which can easily shake or blow out the dust and debris accumulated in the cavity 111 and the mesh skeleton layer 200. This design enables efficient and convenient cleaning operations, significantly extending the effective service life of the product. At the same time, the rectangular hole 510 structure of the pad layer 500 provides expansion space for the cut 112 while effectively preventing accidental tearing of the cut 112 during the cleaning process.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A flocked, dustproof, and anti-clogging mesh sand, characterized in that, include: Grassroots level (100); A mesh skeleton layer (200) is hot-pressed and bonded to the bottom surface of the base layer (100); A flocked layer (300) is attached to the non-overlapping bottom surface of the base layer (100) and the mesh skeleton layer (200) by an electrostatic adsorption process; An abrasive layer (400) is bonded to the bottom surface of a flocked layer (300); The base layer (100) includes a hollow polymer foam layer (110), and the grid skeleton layer (200) is hot-pressed and bonded to the bottom surface of the base layer (100). The hollow polymer foam layer (110) and the grid skeleton layer (200) intersect to form a cavity (111). A cut (112) is provided on the top surface of the hollow polymer foam layer (110). The cut (112) extends downward through the adjacent cavity (111). The cut (112) is Y-shaped.

2. The flocked dustproof and anti-clogging mesh sand according to claim 1, characterized in that, The top surface of the base layer (100) is hot-pressed and bonded with a padding layer (500), and the top surface of the padding layer (500) has rectangular holes (510) that are evenly distributed and staggered with the cutout (112).

3. The flocked dustproof and anti-clogging mesh sand according to claim 2, characterized in that, The padding layer (500) is a foam double-sided adhesive material component, and the top surface of the padding layer (500) is covered with release paper.

4. The flocked dustproof and anti-clogging mesh sand according to claim 1, characterized in that, The mesh skeleton layer (200) is a modified PP material component, the flocking layer (300) is a nylon flocking material component, and the abrasive layer (400) is a silicon carbide or alumina material component.

5. The flocked dustproof and anti-clogging mesh sand according to claim 2, characterized in that, The hollow polymer foam layer (110) has a thickness of 1.0-1.5 mm, the mesh skeleton layer (200) has a mesh pore size of 0.5-2.0 mm, the flocking layer (300) has a flock length of 0.3-0.8 mm, the abrasive layer (400) has a particle size of 600-800 mesh, and the padding layer (500) has a thickness of 1.0-1.5 mm.

6. A method for manufacturing a flocked dustproof and anti-clogging mesh sand, comprising the flocked dustproof and anti-clogging mesh sand according to any one of claims 1-5, characterized in that: The method for manufacturing the flocked dustproof and anti-clogging mesh sand is as follows: Step 1 Substrate pretreatment: The base layer (100) is pretreated and a cavity (111) structure is formed by hot pressing and fusion; Step 2 Composite layer bonding: Composite mesh skeleton layer (200) and pad layer (500) are bonded on both sides of the base layer (100) and cured. Step 3 Cutting (112): A Y-shaped cut (112) is made on the top surface of the base layer (100) to penetrate the cavity (111); Step 4: Electrostatic flocking: A flocking layer (300) is attached to the bottom surface of the composite structure using an electrostatic adsorption process and then dried and cured. Step 5 Abrasive layer application: Apply an abrasive layer (400) to the bottom of the flocked layer (300) and solidify it by step curing; Step 6: Cutting and trimming: Cut and trim the edges to obtain the finished product.

7. The method for producing flocked dustproof and anti-clogging mesh sand according to claim 6, characterized in that, The detailed process of step 1 is as follows: Step 1.1 Hot pressing of foam layer: Place the wavy concave parts of two wavy hollow polymer foam materials opposite each other, fix the corners by hot pressing and fusion treatment to form a hollow polymer foam layer (110) and initially construct the cavity (111). Step 1.2 Adhesive application and layer placement: Subsequently, water-based adhesive is evenly applied to both sides of the pretreated base layer (100), the mesh skeleton layer (200) is placed on the bottom surface of the base layer (100), and the padding layer (500) is placed on the top surface of the base layer (100); Step 1.3 Pressure curing: Apply 0.3-0.5MPa pressure at 60-80℃ for 20-40 minutes to cure firmly, so that the grid skeleton layer (200) and the pad layer (500) are firmly bonded and the cavity (111) is finally formed.

8. The method for producing flocked dustproof and anti-clogging mesh sand according to claim 7, characterized in that, In step 3, a Y-shaped cut (112) needs to be processed on the top surface of the composite base layer (100) by staggered stamping. The cut (112) penetrates the adjacent cavity (111) downwards. It is necessary to ensure that the shape of the cut (112) is evenly distributed and staggered with the rectangular hole (510) of the pad layer (500). During the processing, the stamping depth and position need to be controlled to avoid damaging the grid skeleton layer (200) and the cavity (111) structure.

9. The method for manufacturing flocked dustproof and anti-clogging mesh sand according to claim 6, characterized in that, The detailed process of step 4 is as follows: Step 4.1 Electrostatic flocking operation: Electrostatic flocking is performed on the composite base layer (100) and grid skeleton layer (200) structure. The nylon flock material is adsorbed onto the non-overlapping bottom surface of the base layer (100) and grid skeleton layer (200) using an electrostatic generator, covering the surface and hole walls to form a flock layer (300). Step 4.2 Drying and curing: After flocking, dry and cure at 110-130℃ for 30-50 minutes to ensure that the flocking fibers adhere firmly and that the flocked layer (300) is evenly distributed and has good adsorption properties.

10. The method for producing flocked dustproof and anti-clogging mesh sand according to claim 6, characterized in that, The detailed process of step 5 is as follows: Step 5.1 Abrasive coating: Apply resin adhesive to the bottom surface of the flocked layer (300), and evenly spread silicon carbide or alumina abrasive to form an abrasive layer (400). Step 5.2 Step curing: Then pre-cur at 90-110℃ for 15-25 minutes, and then raise the temperature to 140-160℃ for 40-60 minutes to fully cure, so that the abrasive layer (400) is firmly bonded.

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