Etching process and drag net for connectionless products

Abstract

The application relates to the technical field of etching processing, and particularly discloses an etching process for a product without a connecting point and a trawl, which comprises the following steps: etching a product by using a trawl, the trawl comprising an upper mesh, a lower mesh and a guide frame, the upper mesh and the lower mesh being oppositely arranged and fixed to the guide frame; an etching process comprising the following steps: placing a sheet-shaped product after solidification and development between the upper mesh and the lower mesh; dragging the sheet-shaped product by the guide frame to perform etching and form a plurality of small individuals; and dragging the small individuals by the guide frame to perform film stripping to remove the surface film. The application solves the problems in the prior art that the whole process is complex, the labor cost and material cost are high, and the product needs to be operated for multiple times, so that a thin product is prone to deformation, and the yield is low.

Description

Technical Field

[0001] This application relates to the field of etching processing technology, and more specifically, to an etching process and drag net for products without connection points. Background Technology

[0002] In the etching process for small individual products without connection points, in order to prevent the small individual products from falling into the gaps of the conveyor rollers when being transported after etching, a PE protective film needs to be applied to the product surface between etching steps. This ensures that the small individual products remain attached to the PE protective film after etching and do not fall into the gaps.

[0003] A typical etching process using a PE protective film includes at least the following:

[0004] Apply PE protective film once: Apply PE protective film to one side of the product;

[0005] Etching: Products with a protective film on one side are etched using an etching solution;

[0006] One-step membrane removal: The bare membrane surface is cleaned by applying a membrane removal solution.

[0007] Apply a second PE protective film; after removing the first film, apply a second PE protective film to the exposed metal surface, and then manually peel off the first PE protective film.

[0008] Secondary membrane removal: Use a membrane removal solution to thoroughly remove the exposed membrane surface;

[0009] Remove the PE protective film: Peel off the secondary protective film to form individual small units (finished products).

[0010] As can be seen, the entire process is complex and requires a large number of personnel, leading to increased labor costs. PE protective film is a disposable product, which also increases the cost of materials. Furthermore, because the product needs to be coated and peeled off multiple times during the process, thinner products are prone to deformation, resulting in a low yield rate. Summary of the Invention

[0011] The main purpose of this application is to provide an etching process for products without connection points, in order to solve the problems in the related technology that the etching process for products without connection points is complicated, has high labor and material costs, and requires multiple operations, which makes thin products prone to deformation and results in a low yield.

[0012] To achieve the above objectives, this application provides an etching process for products without connection points, comprising:

[0013] Product etching is performed using a drag net, which includes an upper net sheet, a lower net sheet, and a guide frame. The upper net sheet and the lower net sheet are arranged opposite to each other and fixed to the guide frame.

[0014] The etching process includes:

[0015] The cured and developed sheet product is placed between the upper screen and the lower screen.

[0016] The sheet-like product is etched into several small individuals by being guided by the guide frame.

[0017] The guide frame is used to pull the small individual to remove the wet film from its surface.

[0018] Furthermore, the preparation process of the trawl net includes:

[0019] Select appropriate thickness and mesh diameter for the top and bottom mesh sheets;

[0020] The upper mesh and the lower mesh are arranged opposite to each other. The lower mesh is fixedly connected to the four sides of the guide frame on all four sides. At least one opposite side of the upper mesh is fixedly connected to the guide frame.

[0021] During the etching process, the sheet product is placed on the side of the mesh that is not connected to the guide frame.

[0022] Furthermore, the preparation process of the trawl net also includes: opening a number of connection holes along the length direction of the inner edge of the guide frame;

[0023] The lower mesh is stitched to the connecting holes on all four sides by connecting lines, and at least one opposite edge of the upper mesh is stitched to the connecting holes by connecting lines.

[0024] Furthermore, select a wire mesh with appropriate thickness and mesh size, specifically:

[0025] The thickness of the screen is determined based on the allowable throughput of the etching equipment and the stripping equipment, as well as the thickness of the product to be etched, so that the drag net can pass through the etching equipment and the stripping equipment normally.

[0026] The mesh size of the screen is determined based on the etching capability of the etching equipment and the film removal capability of the film removal equipment, so that the film on the surface of the small individual can be removed normally.

[0027] Furthermore, the mesh is made of nylon.

[0028] Furthermore, the sheet-like product is placed in the middle of the lower mesh sheet.

[0029] Furthermore, etching processes for products without connection points also include:

[0030] The small individuals after film removal are dried by guiding the frame, and then the small individuals are removed after drying.

[0031] The next sheet product to be etched is placed between the upper and lower mesh sheets for etching.

[0032] Furthermore, the sheet-like product is prepared through the following steps:

[0033] Surface treatment of raw materials;

[0034] Ink is applied to the material surface using a coating machine and drying tunnel equipment;

[0035] The coated material is exposed to the light to print the pattern onto the material surface;

[0036] The material is developed to remove the unexposed parts and retain the illuminated parts.

[0037] The developed sheet material is dried to solidify the pattern, thus obtaining the sheet product.

[0038] Furthermore, the raw materials undergo surface treatment, specifically as follows:

[0039] The stainless steel raw materials undergo surface treatment including degreasing, pickling, and drying.

[0040] The coated material is exposed to the light to print the pattern onto the material surface, specifically:

[0041] The pattern is printed onto the surface of the coated material using resin film and ultraviolet light.

[0042] The material is developed to remove the unexposed areas and retain the illuminated areas, specifically:

[0043] Use sodium carbonate solution to reveal the unexposed parts of the image, while retaining the parts exposed to light.

[0044] Before placing the cured and developed sheet product on the trawl, the process also includes sorting the developed material and selecting those with defects for repair.

[0045] According to another aspect of this application, a drag net for etching products without connection points is provided, applied to the above-mentioned etching process for products without connection points, characterized in that it includes: a top net sheet, a bottom net sheet, and a guide frame.

[0046] The lower mesh is fixedly connected to the four sides of the guide frame, and at least one opposite side of the upper mesh is fixedly connected to the guide frame.

[0047] The upper and lower screen sheets are used to place the sheet-like product to be etched. In this embodiment, product etching is performed using a drag net, which includes an upper screen sheet, a lower screen sheet, and a guide frame. The upper and lower screen sheets are arranged opposite to each other and fixed to the guide frame. The etching process includes: placing the cured and developed sheet-like product between the upper and lower screen sheets; etching the sheet-like product into several small individuals by pulling it with the guide frame; and removing the film from the small individuals by pulling them with the guide frame. This significantly reduces conventional process steps, simplifies the processing, improves production efficiency, and reduces labor costs. Furthermore, since no PE protective film is needed during etching, material costs are reduced. The elimination of film application and removal operations during processing avoids product deformation caused by multiple operations, improving product yield. This solves the problems in related technologies where etching of products without connection points is complex, labor and material costs are high, and multiple operations on the product can easily cause deformation in thinner products, leading to low yield. Attached Figure Description

[0048] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0049] Figure 1 This is a flowchart illustrating an embodiment of this application;

[0050] Figure 2 This is a schematic diagram of a sheet product placed between the upper and lower mesh sheets according to an embodiment of this application;

[0051] Figure 3 This is a schematic diagram showing the parts etched into small individuals according to an embodiment of this application;

[0052] Figure 4 This is a side cross-sectional view of the trawl net according to an embodiment of this application;

[0053] Figure 5 This is a side sectional view of another installation method of the trawl net according to the embodiments of this application;

[0054] Among them, 1 is the guide frame, 101 is the connecting groove, 102 is the second magnet, 2 is the mesh sheet, 3 is the lower mesh sheet, 4 is the drag net, 5 is the sheet product, 6 is the small individual, 7 is the connecting belt, and 8 is the first magnet. Detailed Implementation

[0055] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0056] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0057] In this application, the terms "upper," "lower," "inner," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily used to better describe this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0058] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0059] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] In addition, the term "multiple" should mean two or more.

[0061] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0062] A typical etching process using a PE protective film includes at least the following:

[0063] Apply PE protective film once: Apply PE protective film to one side of the product;

[0064] Etching: Products with a protective film on one side are etched using an etching solution;

[0065] One-step film removal: The bare, dry film surface is cleaned off with a film removal solution.

[0066] Apply a second PE protective film; after removing the first film, apply a second PE protective film to the exposed metal surface, and then manually peel off the first PE protective film.

[0067] Secondary film removal: Use film removal solution to thoroughly remove the exposed dry film surface;

[0068] Remove the PE protective film: Peel off the secondary protective film to form individual small units (finished products).

[0069] As can be seen, the entire process is complex and requires a large number of personnel, leading to increased labor costs. PE protective film is a disposable product, which also increases the cost of materials. Furthermore, because the product needs to be applied and removed multiple times during the process, thinner products are prone to deformation, resulting in a low yield rate.

[0070] To solve the above technical problems, such as Figures 1 to 3 As shown, this application embodiment provides an etching process for products without connection points, including:

[0071] Product etching is performed using a drag net 4, which includes a top net 2, a bottom net 3, and a guide frame 1. The top net 2 and the bottom net 3 are arranged opposite to each other and fixed to the guide frame 1.

[0072] The etching process includes:

[0073] S10. Place the cured and developed sheet product 5 between the upper screen 2 and the lower screen 3;

[0074] S20. The sheet product 5 is etched to form several small individuals 6 by guiding the guide frame 1.

[0075] S30. The small individual 6 is pulled by the guide frame 1 to remove the membrane from the surface.

[0076] In this embodiment, using a drag net 4 for product etching reduces the original at least six steps to only three. Specifically, the drag net 4 mainly includes upper and lower mesh sheets 2 and 3, which are arranged vertically. The upper mesh sheet 2 and lower mesh sheet 3 have the same structure, both being wire mesh with evenly distributed mesh openings. To facilitate the movement of the drag net 4 and the sheet product 5 during etching, the front ends of the upper mesh sheet 2 and lower mesh sheet 3 are fixed to a guide frame 1. The guide frame 1 is a rigid frame structure; pulling the guide frame 1 moves the drag net 4 and the sheet product 5. After the sheet product 5 has undergone curing and developing, it can be placed between the upper mesh sheet 2 and lower mesh sheet 3 (e.g., ...). Figure 2 (As shown). Next, the guide frame 1 pulls the upper screen 2, lower screen 3, and sheet product 5 along the conveyor rollers. After passing through the etching area, the etching liquid passes through the mesh openings of the upper screen 2 and lower screen 3 and comes into contact with the sheet material, thereby etching the sheet product 5 into several small individuals 6 (such as...). Figure 3 (As shown). Since the small individual 6 formed by etching is still between the upper screen 2 and the lower screen 3, it will not fall into the gap of the conveyor rollers due to the covering and support of the upper and lower screens. After etching is completed, the film removal operation can be performed directly. The film removal liquid can also pass through the mesh of the upper screen 2 and the lower screen 3 and come into contact with the surface of the small individual 6, thereby removing the film from the upper and lower surfaces of the small individual 6 at the same time.

[0077] Compared to conventional product etching using PE film, this embodiment employs a drag net 4 for product etching. Firstly, because the etching process eliminates the need for applying and removing the PE film, and the film can be removed from both the top and bottom surfaces of the product simultaneously, the etching process is significantly shortened, reducing labor costs and improving production efficiency. Secondly, the elimination of the PE film saves material costs, further reducing production costs. Thirdly, the reduced number of steps means less manipulation of the product during etching (e.g., applying, removing, and removing the film twice), greatly reducing the probability of deformation under external forces and thus improving product yield. Ultimately, this application, through the above embodiment, solves the problems in related technologies where etching of products without connection points involves complex processes, high labor and material costs, and requires multiple operations that easily deform thinner products, leading to low yield rates.

[0078] Based on the actual production process, at least three processing steps were reduced, the number of production participants was reduced from 26 to 19, saving 7 people, the output increased from 400 pieces per day to 1000 pieces, an increase of 2.5 times, and the yield rate increased from 70% to 92%.

[0079] It should be noted that the specific shape of the small individual 6 is determined according to the product requirements. In one implementation, such as... Figure 2 and Figure 3 As shown, the sheet-like product 5 has a square structure, and the small individual 6 also has a small square structure.

[0080] In one embodiment, the preparation process of the trawl net 4 includes:

[0081] Select appropriate thicknesses and mesh diameters for the upper mesh 2 and lower mesh 3;

[0082] The upper mesh 2 and the lower mesh 3 are arranged opposite to each other. The lower mesh 3 is fixedly connected to the four sides of the guide frame 1. At least one opposite side of the upper mesh 2 is fixedly connected to the guide frame 1.

[0083] During the etching process, the sheet product 5 is placed on the side of the mesh 2 that is not connected to the guide frame 1.

[0084] In this embodiment, the upper mesh 2 and the lower mesh 3 can be the upper and lower portions of a large-area wire mesh after folding. Of course, it is understood that the upper mesh 2 and the lower mesh 3 can also be separate wire meshes. When the upper mesh 2 and the lower mesh 3 are folded together to form the portion of a wire mesh, when connected to the guide frame 1, the folded edge of the wire mesh is fixedly connected to one side of the guide frame 1. On the side opposite to the folded edge, only the lower mesh 3 is fixedly connected to the guide frame 1, thus forming an opening structure on that side. The other two sides are all fixedly connected to the guide frame 1. The sheet product 5 can be placed between the upper mesh 2 and the lower mesh 3 through this opening structure and can also be removed from this opening structure.

[0085] When the upper mesh 2 and the lower mesh 3 are separate wire meshes, all four sides of the lower mesh 3 can be fixedly connected to the guide frame 1, and all three sides of the upper mesh 2 can be fixedly connected to the guide frame 1. The side of the upper mesh 2 that is not connected to the guide frame 1 serves as an opening structure for inserting and removing the sheet product 5.

[0086] In this embodiment, the method of using a large area of ​​wire mesh to fold into upper mesh 2 and lower mesh 3 is simpler and easier to process than another embodiment. When its folded edge is located in the traction direction of the guide frame 1, it can play a good limiting role for the sheet product 5, and can prevent the sheet product 5 from falling out from that side during the traction process when the connection between the upper mesh 2 and lower mesh 3 and the guide frame 1 is broken.

[0087] In one embodiment, the preparation process of the trawl 4 further includes: opening a plurality of connecting holes along the length direction of the inner edge of the guide frame 1.

[0088] The lower mesh 3 is sewn to the connecting holes on all four sides by connecting lines, and at least one opposite edge of the upper mesh 2 is sewn to the connecting holes by connecting lines.

[0089] In addition, it should be noted that, besides connecting the upper mesh 2, lower mesh 3 and guide frame 1 by sewing, this embodiment provides another connection method to facilitate the installation and disassembly of the upper mesh 2 and lower mesh 3.

[0090] Specifically, such as Figure 5 As shown, in this embodiment, annular connecting grooves 101 are formed on the upper and lower surfaces of the guide frame 1. The depth of the connecting grooves 101 is greater than or equal to the thickness of the upper mesh 2 or the lower mesh 3. A plurality of first magnets 8 are embedded in the connecting grooves 101 along their length. An annular connecting strip 7 is fixedly connected around the upper mesh 2 and the lower mesh 3. The connecting strip 7 is fixedly connected to the upper mesh 2 and the lower mesh 3 by adhesive or sewing. A plurality of second magnets 102 are arranged in the connecting strip 7 along its length, and the positions of the first magnets 8 and the second magnets 102 correspond to each other.

[0091] During installation, the mesh sheet 2 can be inserted from above into the connecting groove 101 on the upper surface of the guide frame 1. The connecting strips 7 around the mesh sheet 2 are directly attracted and fixed by the second magnet 102 and the first magnet 8. Similarly, the lower mesh sheet 3 can be inserted from below into the connecting groove 101 on the lower surface of the guide frame 1. The connecting strips 7 around the lower mesh sheet 3 are also directly attracted and fixed by the second magnet 102 and the first magnet 8. When handling sheet-shaped products 5 and small individual items 6, the mesh sheet 2 can be lifted for operation.

[0092] In this embodiment, the connection between the upper mesh 2, lower mesh 3, and guide frame 1 is achieved using magnetic attraction, making the installation and removal of the upper mesh 2 and lower mesh 3 more convenient and facilitating their replacement. In this embodiment, since connecting grooves 101 are provided on both the upper and lower surfaces of the guide frame 1, a protruding annular plate structure is formed around the guide frame 1. The first magnet 8 can be embedded within this annular plate structure, and the magnetic force it generates can act simultaneously within the connecting grooves 101 on both the upper and lower surfaces. That is, in this embodiment, the first magnet 8 generates an N-pole magnetic force in the upper connecting groove 101 and an S-pole magnetic force in the lower connecting groove 101. Correspondingly, the lower end of the second magnet 102 in the connecting strip 7 connected to the upper mesh 2 is an S-pole, and the upper end of the second magnet 102 in the connecting strip 7 connected to the lower mesh 3 is an N-pole.

[0093] Additionally, it should be noted that the depth of the connecting groove 101 must be greater than or equal to the thickness of the upper mesh 2 or lower mesh 3, and also greater than the thickness of the connecting strip 7 containing the second magnet 102. This ensures that the surfaces of the connecting strip 7, the upper mesh 2, and the lower mesh 3 do not protrude from the surface of the guide frame 1. Consequently, during traction, the connecting strip 7, the upper mesh 2, and the lower mesh 3 will not experience significant resistance. This facilitates easy installation and disassembly, preventing the connecting strip 7 from detaching from the guide frame 1. To prevent etching liquid from adhering to the first magnet 8 and the second magnet 102, the connecting strip 7 is made of waterproof material. After the first magnet 8 is fully embedded in the connecting groove 101, a waterproof membrane is attached to the surface of the connecting groove 101, covering the surface of the first magnet 8 to prevent the etching liquid from contacting the first magnet 8.

[0094] Because the sheet product 5 is placed between the upper screen 2 and the lower screen 3 for etching in this invention, its overall thickness is greater than when the PE protective film is simply applied to the sheet product 5. Furthermore, since the liquid needs to pass through the mesh openings before contacting the sheet product 5 during etching, the thickness of the upper screen 2 and the lower screen 3, as well as the mesh size, affect the etching process. Specifically, the thickness of the upper screen 2 and the lower screen 3 affects the throughput during etching and film removal. The mesh size affects the etching and film removal results; therefore, a suitable screen thickness and mesh size must be selected based on product and equipment parameters.

[0095] Specifically, in this embodiment, a wire mesh of suitable thickness and mesh size is selected, specifically:

[0096] The thickness of the screen is determined based on the allowable throughput of the etching equipment and the stripping equipment, as well as the thickness of the sheet product 5 to be etched, so that the drag net 4 can pass through the etching equipment and the stripping equipment normally; in other words, it is necessary to ensure that the thickness of the combination of the upper screen 2, the sheet product 5 and the lower screen 3 after the sheet product 5 is placed between the upper screen 2 and the lower screen 3 can meet the throughput requirements.

[0097] The mesh size of the screen is determined based on the etching capacity of the etching equipment and the stripping capacity of the stripping equipment, so that the film on the surface of the small individual 6 can be removed normally; in other words, the mesh size needs to allow the etching liquid and stripping liquid to pass smoothly through the mesh and make full contact with the sheet product 5. In one embodiment, the screen is made of nylon.

[0098] Since the sheet product 5 will form several separate small individuals 6 after etching, and the upper and lower mesh sheets 2 and 3 do not provide any fixing function for these small individuals 6, they will experience some displacement during transport by the conveyor rollers. To prevent these small individuals 6 from detaching from the mesh sheet after displacement and falling into the gaps of the conveyor rollers, the upper and lower mesh sheets 2 and 3 need to provide sufficient coverage area. Therefore, in this embodiment, the length and width dimensions of the upper and lower mesh sheets 2 and 3 are both larger than the length and width dimensions of the sheet product 5, allowing the sheet product 5 to be placed in the middle of the lower mesh sheet 3.

[0099] After etching and film removal, sheet product 5 needs to be dried. Therefore, in this embodiment, the etching process for products without connection points also includes:

[0100] The small individual 6 after film removal is dried by guiding frame 1, and then the small individual 6 is removed after drying.

[0101] Since this embodiment uses a drag net 4 for etching the product, compared to using a PE protective film, the drag net 4 is reusable. Therefore, after completing one etching process for a sheet product 5, the drag net 4 can be reused for the next etching process. Specifically, the next sheet product 5 to be etched is placed between the upper drag net 2 and the lower drag net 3 for etching. This embodiment further reduces the etching cost of the product through the above-mentioned means.

[0102] In one method of preparing the sheet product 5, the sheet product 5 is obtained through the following steps:

[0103] Surface treatment of raw materials;

[0104] Photosensitive ink is applied to the surface of the material using a coating machine and drying tunnel equipment, at which point a film is formed on both the upper and lower surfaces of the material.

[0105] The coated material is exposed to the light to print the pattern onto the material surface;

[0106] The material is developed to remove the unexposed parts and retain the illuminated parts.

[0107] The developed material is dried to solidify the pattern, resulting in a sheet product 5.

[0108] Furthermore, the raw materials undergo surface treatment, specifically as follows:

[0109] The stainless steel raw materials undergo surface treatment including degreasing, pickling, and drying.

[0110] The coated material is exposed to the light to print the pattern onto the material surface, specifically:

[0111] The pattern is printed onto the surface of the coated material using resin film and ultraviolet light.

[0112] The material is developed to remove the unexposed areas and retain the illuminated areas, specifically:

[0113] Use sodium carbonate solution to reveal the unexposed parts of the image, while retaining the parts exposed to light.

[0114] Before placing the cured and developed sheet product 5 onto the trawl 4, the process also includes sorting the developed material and selecting those with defects for repair.

[0115] According to another aspect of this application, such as Figures 2 to 4 As shown, a drag net 4 for etching products without connection points is provided, which is applied to the above-mentioned etching process for products without connection points. It includes: a top net sheet 2, a bottom net sheet 3, and a guide frame 1; the bottom net sheet 3 is fixedly connected to the four sides of the guide frame 1, and at least one opposite side of the top net sheet 2 is fixedly connected to the guide frame 1; a sheet-like product 5 to be etched is placed between the top net sheet 2 and the bottom net sheet 3.

[0116] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An etching process for products without connection points, characterized in that, include: Product etching is performed using a drag net, which includes an upper net sheet, a lower net sheet, and a guide frame. The upper net sheet and the lower net sheet are arranged opposite to each other and fixed to the guide frame. The upper and lower surfaces of the guide frame are provided with annular connecting grooves, and an annular plate structure protruding towards the center is formed around the guide frame. The annular plate structure is provided with a first magnet. A ring-shaped connecting strip is fixedly connected around the top and bottom meshes. A second magnet is provided in the connecting strip. The connecting strip on the top mesh is installed in the connecting groove on the upper surface of the guide frame and is magnetically attracted to the first magnet by the second magnet. The connecting strip on the bottom mesh is installed in the connecting groove on the lower surface of the guide frame and is magnetically attracted to the first magnet by the second magnet. The depth of the connecting groove is greater than or equal to the thickness of the upper mesh and the lower mesh after the connecting strip and the second magnet are configured, so that the surfaces of the connecting strip, the upper mesh, and the lower mesh do not protrude from the surface of the guide frame. The etching process includes: The cured and developed sheet product is placed between the upper screen and the lower screen; The sheet-like product is etched into several small individuals by being guided by the guide frame. The guide frame is used to guide the small individual to remove the film from its surface.

2. The etching process for products without connection points according to claim 1, characterized in that, The preparation process of the trawl net includes: Select appropriate thickness and mesh diameter for the top and bottom mesh sheets; The upper mesh and the lower mesh are arranged opposite to each other. The lower mesh is fixedly connected to the four sides of the guide frame on all four sides. At least one opposite side of the upper mesh is fixedly connected to the guide frame. During the etching process, the sheet product is placed on the side of the mesh that is not connected to the guide frame.

3. The etching process for products without connection points according to claim 2, characterized in that, The preparation process of the trawl net also includes: opening a number of connection holes along the length direction of the inner edge of the guide frame; The lower mesh is stitched to the connecting holes on all four sides by connecting lines, and at least one opposite edge of the upper mesh is stitched to the connecting holes by connecting lines.

4. The etching process for products without connection points according to claim 2 or 3, characterized in that, Choose a wire mesh with appropriate thickness and mesh size, specifically: The thickness of the screen is determined based on the allowable throughput of the etching equipment and the stripping equipment, as well as the thickness of the product to be etched, so that the drag net can pass through the etching equipment and the stripping equipment normally. The mesh size of the screen is determined based on the etching capability of the etching equipment and the film removal capability of the film removal equipment, so that the film on the surface of the small individual can be removed normally.

5. The etching process for products without connection points according to claim 4, characterized in that, The mesh is made of nylon.

6. In the etching process for products without connection points according to claim 4, the sheet-like product is placed in the middle of the lower mesh.

7. The etching process for products without connection points according to claim 4, characterized in that, The etching process for products without connection points also includes: The small individuals after film removal are dried by guiding the frame, and then the small individuals are removed after drying. The next sheet product to be etched is placed between the upper and lower mesh sheets for etching.

8. The etching process for products without connection points according to claim 1, characterized in that, The sheet-like product is obtained through the following steps: Surface treatment of raw materials; Ink is applied to the material surface using a coating machine and drying tunnel equipment; The coated material is exposed to the light to print the pattern onto the material surface; The material is developed to remove the unexposed parts and retain the illuminated parts. The developed material is dried to solidify the pattern, resulting in the sheet-like product.

9. The etching process for products without connection points according to claim 8, characterized in that, The raw materials undergo surface treatment, specifically as follows: The stainless steel raw materials undergo surface treatment including degreasing, pickling, and drying. The coated material is exposed to the light to print the pattern onto the material surface, specifically: The pattern is printed onto the surface of the coated material using resin film and ultraviolet light. The material is developed to remove the unexposed areas and retain the illuminated areas, specifically: Use sodium carbonate solution to reveal the unexposed parts of the image, while retaining the parts exposed to light. Before placing the cured and developed sheet product on the trawl, the process also includes sorting the developed material and selecting those with defects for repair.

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