Water-based imitation leather paint spraying method for metal fasteners

Abstract

According to the water-based imitation leather paint spraying method for the metal fastener, the water-based imitation leather paint is adopted for spraying the metal fastener, harmful gas emission is effectively reduced, and the environmental protection performance is improved. The specific primer and the water-based imitation leather paint are prepared, particularly the water-based imitation leather paint is sprayed in a semi-dry adhesive state of the primer, and then baking is performed, so that the primer and the water-based imitation leather paint can be fully cured to form a firm paint film layer, the surface quality of the metal fastener is improved, and the service life of the metal fastener is prolonged; the adhesive force and the weather resistance of the water-based leather-like paint on the metal fastener are improved. The waterborne polyurethane resin has good wear resistance, weather resistance and environmental protection performance, and by adding the silicon dioxide, the DPM film-forming agent, the polydimethylsiloxane dispersion liquid and other assistants, the film-forming property and adhesive force of the waterborne polyurethane resin are improved, and meanwhile, the weather resistance and wear resistance of a paint film are improved.

Description

Technical Field

[0001] The invention relates to the field of clothing accessories, and in particular to a method for spraying water-based imitation leather paint for metal fasteners. Background Art

[0002] Metal fasteners are important components for connecting and fixing various items. Their appearance and texture have a great impact on the overall beauty of the product.

[0003] In the field of metal fastener surface treatment, traditional coating methods mostly use oil-based paints. The coating of metal fasteners usually includes pretreatment, primer spraying, baking, topcoat spraying and re-baking. However, the primer and topcoat used in these steps are oil-based paints, which have problems such as large environmental pollution and high VOCs (volatile organic compounds) emissions.

[0004] Therefore, it is necessary to provide a method for spraying water-based imitation leather paint for metal fasteners to solve the above technical problems. Summary of the invention

[0005] The invention provides a method for spraying water-based imitation leather paint for metal fasteners, so as to solve the problem that traditional metal fastener surface treatment in the prior art mostly adopts oil-based paint, but the oil-based paint has the problems of environmental pollution and high emission.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a method for spraying water-based imitation leather paint for metal fasteners, which comprises:

[0007] S1: Hang the metal fastener on the mesh plate, then hang the mesh plate on the painting device, and spray the metal fastener through the spraying robot;

[0008] S2: preparing and spraying a primer, wherein the primer comprises a polyester resin paint and a thinner;

[0009] S3: Baking the primer so that the primer is not completely cured and a primer glue layer is formed;

[0010] S4: preparing a water-based imitation leather paint, which specifically comprises:

[0011] S41: mixing waterborne polyurethane resin, water, silicon dioxide, DPM film former, polydimethylsiloxane dispersion, polyamide wax, polyether siloxane copolymer and amine neutralizer to prepare waterborne imitation leather paint primer;

[0012] S42: adding a curing agent and pure water to a water-based imitation leather paint base material to prepare a water-based imitation leather paint;

[0013] S5: Spraying water-based imitation leather paint: spraying water-based imitation leather paint on the surface of the primer glue layer;

[0014] S6: baking the water-based imitation leather paint: putting the metal fastener sprayed with the water-based imitation leather paint into an oven for baking, so that the primer glue layer and the water-based imitation leather paint are cured to form a water-based imitation leather paint layer.

[0015] In the present invention, the ratio of the polyester resin paint to the diluent is in the range of 1.0:0.5 to 1.0:1.0.

[0016] In the present invention, the baking temperature of the oven is set to 80-100° C. in S3, and the baking time is 20-30 minutes.

[0017] In the present invention, the proportion of the water-based imitation leather paint primer in S71 is 70% to 80% of water-based polyurethane resin, 10% to 20% of water, 2% to 6% of silicon dioxide, 2% to 6% of DPM film-forming agent, 0.5% to 3% of polydimethylsiloxane dispersion, 0.5% to 3% of polyamide wax, 0.5% to 3% of polyether siloxane copolymer, and 0.1% to 1% of amine neutralizer, by weight percentage.

[0018] In the present invention, the ratio of the water-based imitation leather paint primer to the curing agent to pure water is in the range of 10:2:1 to 10:2:2.

[0019] In the present invention, in S6, the baking temperature of the oven is set to 110-150° C., and the baking time is 40-60 minutes.

[0020] In the present invention, the paint spraying device comprises:

[0021] A liquid collecting tank is used to collect the paint liquid after spraying;

[0022] A support frame, located on one side of the liquid collecting tank;

[0023] The rotating disc is located above the liquid collecting tank and is rotatably connected to the support frame. The mesh plate is detachably arranged on the rotating disc, and different surfaces of the metal fastener are sprayed by a spraying manipulator.

[0024] In the present invention, the rotating disc comprises:

[0025] An outer ring, connected to the support frame on both sides, and used to support the mesh plate;

[0026] A fixed column is arranged on the outer ring, and the fixed column is provided with an external thread, and the mesh plate is sleeved on the outer side of the fixed column;

[0027] A positioning piece is sleeved on the fixing column, and the positioning piece is located above the mesh plate; and

[0028] The fixing nut is threadedly connected to the fixing column, and the fixing nut is used to limit the connection position of the positioning piece and the fixing column.

[0029] In the present invention, the positioning member includes:

[0030] A fixing plate is located above the mesh plate and below the fixing nut, and the fixing plate is sleeved on the fixing column;

[0031] An extension piece, one end of which is connected to the fixing piece, and the extension piece is parallel to the plane where the outer ring is located; and

[0032] A fixing clip is connected to the bottom end of the extension piece, and is used to clamp the mesh plate.

[0033] In the present invention, the mesh plate includes a frame and a plurality of grid bars arranged in a crisscross pattern in the frame; the fixing clip includes:

[0034] A connecting portion, located at the top of the fixing clip, the connecting portion being connected to the extension piece; and

[0035] The clamping part is located at the bottom end of the fixing clamp, and the clamping part includes two clamping feet arranged opposite to each other, and the clamping feet are used to clamp and define the position of the grid bars.

[0036] Compared with the prior art, the present invention has the following beneficial effects: the water-based imitation leather paint spraying method for metal fasteners of the present invention uses water-based imitation leather paint to spray metal fasteners, effectively reducing VOCs emissions and improving environmental protection performance. By preparing a specific primer and water-based imitation leather paint, especially spraying the water-based imitation leather paint when the primer is semi-dry and sticky, and then baking, the primer and the water-based imitation leather paint can be fully cured to form a firm paint film layer, thereby improving the surface quality and service life of the metal fasteners, and improving the adhesion and weather resistance of the water-based imitation leather paint on the metal fasteners.

[0037] Waterborne polyurethane resin is widely used in the field of coatings due to its good wear resistance, weather resistance and environmental performance. However, the application of waterborne polyurethane resin in the imitation leather paint spraying of metal fasteners needs to solve the problems of its film forming property, adhesion and weather resistance. The present invention improves the film forming property and adhesion of waterborne polyurethane resin by adding auxiliary agents such as silicon dioxide, DPM film former, polydimethylsiloxane dispersion, and at the same time improves the weather resistance and wear resistance of the paint film.

[0038] The paint spraying device of the present invention makes the installation and removal of the metal fasteners more convenient through the design of the mesh plate and the rotating disc, thereby improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0040] Figure 1 Flow chart of a preferred embodiment of the present invention.

[0041] Figure 2 It is a schematic structural diagram of a spraying device according to a preferred embodiment of the present invention.

[0042] Figure 3 FIG. 1 is a diagram showing the use of a rotating disk according to a preferred embodiment of the present invention.

[0043] Figure 4 Schematic diagram of the internal structure of an oven according to a preferred embodiment of the present invention.

[0044] Figure 5 It is a three-dimensional diagram of the positioning member structure of a preferred embodiment of the present invention.

[0045] Figure 6 It is a cross-sectional view of the connection structure between the extension piece and the fixing clip according to a preferred embodiment of the present invention.

[0046] Reference numerals: 11, metal fastener; 12, mesh plate; 121, frame; 122, grid; 13, paint spraying device; 131, support frame; 1311, fixed rod; 1312, movable rod; 1313, second driving member; 132, rotating disk; 1321, outer ring; 13211, first through hole; 1322, fixed column; 1323, fixed nut; 133, liquid collecting tank; 134, spraying manipulator; 1 35. First driving member; 136. Positioning member; 1361. Fixing plate; 1362. Extension plate; 13621. Mounting hole; 13622. Receiving groove; 13623. Guide groove; 1363. Fixing clip; 13631. Connecting portion; 13632. Clamping portion; 13633. Limiting hole; 13634. Mounting channel; 13635. First limiting block; 13636. Second limiting block; 14. Oven. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0048] In the figures, structurally similar elements are denoted by the same reference numerals.

[0049] The terms "first", "second", etc. in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be used as a limitation on the order of precedence.

[0050] Please refer to Figure 1 ,in Figure 1 The present invention is a flow chart of a preferred embodiment of a method for spraying water-based imitation leather paint for metal fasteners.

[0051] The following is a preferred embodiment of a method for spraying water-based imitation leather paint for metal fasteners provided by the present invention, which can solve the above technical problems.

[0052] The preferred embodiment of the water-based imitation leather paint spraying method for metal fasteners provided by the present invention is: a water-based imitation leather paint spraying method for metal fasteners, comprising:

[0053] S1: Mounting and spraying preparation of the metal fastener 11 . The metal fastener 11 is mounted on the mesh plate 12 , and then the mesh plate 12 is mounted on the spraying device 13 , and the metal fastener 11 is sprayed by the spraying robot 134 .

[0054] like Figure 2 and Figure 3 As shown, first, the metal fasteners 11 to be sprayed are mounted on a special mesh plate 12 according to a predetermined layout. The mesh plate 12 is composed of a frame 121 and crisscrossing grid bars 122, which are convenient for fixing and separating the metal fasteners 11. Subsequently, the mesh plate 12 with the metal fasteners 11 is mounted on a rotating disc 132 of a paint spraying device 13. The rotating disc 132 is connected to a liquid collecting tank 133 through a support frame 131. The liquid collecting tank 133 is used to collect the paint liquid dripping during the spraying process to reduce environmental pollution.

[0055] S2: preparing and spraying a primer, wherein the primer comprises a polyester resin paint and a thinner; the ratio of the polyester resin paint to the thinner is in the range of 1.0:0.5 to 1.0:1.0.

[0056] In this embodiment, the ratio of the polyester resin paint to the diluent is preferably set to 1.0:0.75 to ensure the fluidity and adhesion of the primer. After the polyester resin paint and the diluent are evenly mixed in proportion, the primer is sprayed on the metal fastener 11 by the spraying robot 134. During the spraying process, ensure that the primer evenly covers the surface of the metal fastener 11 without omission or accumulation.

[0057] S3: baking the primer so that the primer is not completely cured and a primer adhesive layer is formed; setting the baking temperature of the oven 14 to 80-100° C. and the baking time to 20 to 30 minutes.

[0058] After the primer is sprayed, the screen 12 with the metal fastener 11 is sent to the oven 14 for baking. The baking temperature of the oven 14 is set to 90° C. and the baking time is 25 minutes.

[0059] During the baking process, the surface of the primer should be in a "semi-dry state", the primer is not completely cured, and it feels a little sticky, forming a primer glue layer with certain adhesion and hardness. However, the primer is not completely cured at this time, and still retains a certain viscosity, so as to form a good combination with the subsequent sprayed water-based imitation leather paint, which can improve the bonding strength of the water-based imitation leather paint and the polyester resin paint.

[0060] S4: Preparation and spraying of water-based imitation leather paint. Specifically including:

[0061] S41: mixing waterborne polyurethane resin, water, silicon dioxide, DPM film former, polydimethylsiloxane dispersion, polyamide wax, polyether siloxane copolymer and amine neutralizer to prepare waterborne imitation leather paint primer;

[0062] By weight percentage, the proportions of the water-based imitation leather paint primer in S71 are 70% to 80% water-based polyurethane resin, 10% to 20% water, 2% to 6% silicon dioxide, 2% to 6% DPM film-forming agent, 0.5% to 3% polydimethylsiloxane dispersion, 0.5% to 3% polyamide wax, 0.5% to 3% polyether siloxane copolymer, and 0.1% to 1% amine neutralizer.

[0063] Among them, waterborne polyurethane resin is a polyurethane with water as the dispersion medium, which has the characteristics of high performance, high environmental protection, high hardness, high gloss, and high water resistance. As the main ingredient in the formula, waterborne polyurethane resin provides excellent flexibility and wear resistance for the base material, while ensuring the hardness and gloss of the coating. Its high environmental protection is also in line with the development trend of the modern coatings industry. Water plays the role of a diluent in the formula, making the base material easier to construct and apply. At the same time, the volatilization of water in the subsequent baking operation also helps to form a solid paint film. Silica can improve the fluidity and anti-stickiness of the base material, while increasing the hardness and smoothness of the paint film.

[0064] DPM film former is dipropylene glycol methyl ether. As an auxiliary agent for water-based paint, DPM film former helps to reduce the emission of volatile organic compounds and meets environmental protection requirements. DPM film former can promote the plastic flow and elastic deformation of film-forming materials such as water-based polyurethane resin, thereby improving its aggregation performance and allowing the paint to form a good film layer in a wide range of construction temperatures. This is crucial for water-based imitation leather paint because it ensures that the paint film can be uniformly and stably cured under various conditions. The addition of DPM film former improves the paint film performance of water-based imitation leather paint, helps to improve the gloss, flexibility and elasticity of the paint film, thereby making the paint film have a leather-like feel.

[0065] Polydimethylsiloxane dispersion can significantly improve the waterproof performance and durability of the coating, while enhancing the wear resistance and chemical corrosion resistance of the coating. Polyamide wax is a coating additive that has the function of reducing surface tension, enhancing water resistance and durability. Polyamide wax can make the base material smoother and reduce the shrinkage and peeling of the coating. At the same time, it can also enhance the water resistance and durability of the paint film. Polyether siloxane copolymer can further improve the flexibility and weather resistance of the base material, making the coating more adaptable to various environmental conditions. Amine neutralizer is an additive that can adjust the pH of the coating. The addition of amine neutralizer helps to stabilize the pH value of the base material and ensure that the coating maintains stable performance during the construction process. At the same time, it can also promote the dispersion and dissolution of the coating, and improve the uniformity and adhesion of the coating.

[0066] In summary, the water-based imitation leather paint primer shows excellent performance in terms of flexibility, hardness, glossiness, water resistance, durability, etc. The materials in the formula have good fluidity and dispersibility, making the construction process more convenient and efficient. At the same time, the adhesion and film-forming properties of the primer are also significantly improved. The materials in the formula are all environmentally friendly materials, which meet the environmental protection requirements of the modern coatings industry.

[0067] S42: Adding a curing agent and pure water to a water-based imitation leather paint base to prepare a water-based imitation leather paint; wherein the ratio of the water-based imitation leather paint base to the curing agent to pure water is in the range of 10:2:1 to 10:2:2.

[0068] In this embodiment, the ratio of water-based imitation leather paint base, curing agent and pure water is in the range of 10:2:1.5. During the mixing process, attention should be paid to controlling the stirring speed and stirring time to avoid bubbles and precipitation. The addition of curing agent and pure water not only saves the cost of the paint base, but also enables the water-based imitation leather paint to be better cured to form a paint film with an imitation leather feel, thereby improving the overall aesthetics and texture of the metal fastener 11.

[0069] S5: Spraying water-based imitation leather paint: Spray water-based imitation leather paint on the surface of the primer glue layer. During the spraying process, ensure that the water-based imitation leather paint evenly covers the primer glue layer without omission or accumulation.

[0070] S6: baking water-based imitation leather paint: putting the metal fastener 11 sprayed with water-based imitation leather paint into the oven 14 for baking, so that the primer glue layer and the water-based imitation leather paint are cured to form a water-based imitation leather paint layer. The baking temperature of the oven 14 is set to 110-150° C., and the baking time is 40-60 minutes.

[0071] After spraying the water-based imitation leather paint, the mesh plate 12 with the metal fastener 11 is sent to the oven 14 for baking again. The baking temperature of the oven 14 is set to 130° C. and the baking time is 50 minutes. During the baking process, the primer glue layer and the water-based imitation leather paint are gradually cured to form a water-based imitation leather paint layer with an imitation leather feel and good weather resistance.

[0072] The paint spraying device 13 in this embodiment is described in detail as follows:

[0073] Combination Figure 2 The paint spraying device 13 includes: a support frame 131, a rotating disc 132, a liquid collecting tank 133 and a spraying manipulator 134; the liquid collecting tank 133 is used to collect the paint liquid after spraying; the support frame 131 is located on one side of the liquid collecting tank 133; the support frame 131 is used to support and fix the rotating disc 132. The structure of the support frame 131 is stable and the height is easy to adjust to adapt to metal fasteners 11 and mesh plates 12 of different sizes. The material of the support frame 131 is high-strength steel to ensure its bearing capacity and stability. The rotating disc 132 is located above the liquid collecting tank 133, and the rotating disc 132 is rotatably connected to the support frame 131. The mesh plate 12 is placed on the rotating disc 132, and the surface of the metal fastener 11 is sprayed by the spraying manipulator 134. In actual operation, the mesh plate 12 can be placed flat on the rotating disc 132, and the metal fastener 11 is sprayed by the three-axis rotation of the spraying manipulator 134, thereby realizing the problem of all-round painting.

[0074] Furthermore, the paint spraying device 13 also includes a first driving member 135, and the first driving member 135 is arranged on the support frame 131. The first driving frame is connected to the rotating disk 132. The first driving member 135 drives the rotating disk 132 to rotate and cooperates with the spraying robot 134 to further improve the efficiency and automation of painting.

[0075] Combination Figure 3 The rotating disk 132 includes an outer ring 1321, a fixed column 1322, a positioning piece 136 and a fixing nut 1323; both sides of the outer ring 1321 are connected to the support frame 131, and the outer ring 1321 is used to support the mesh plate 12. The design of the outer ring 1321 provides a stable supporting surface for the mesh plate 12, ensuring stability during the painting process; the fixed column 1322 is arranged on the outer ring 1321, and the fixed column 1322 is provided with an external thread, and the mesh plate 12 is sleeved on the outside of the fixed column 1322. The design of the external thread enables the fixed column 1322 to be firmly connected to the fixing nut 1323, and is easy to disassemble and replace. The positioning member 136 is sleeved on the fixing column 1322. The positioning member 136 is located above the mesh 12. The positioning member 136 is connected to the mesh 12, thereby limiting the position of the mesh 12 on the outer ring 1321. The design of the positioning member 136 further fixes the position of the mesh 12 to prevent it from moving or falling off during the painting process. The fixing nut 1323 is threadedly connected to the fixing column 1322. The fixing nut 1323 is used to limit the connection position of the positioning member 136 and the fixing column 1322, ensuring a firm connection between the positioning member 136 and the fixing column 1322, while facilitating adjustment and disassembly.

[0076] In this embodiment, the outer ring 1321 is provided with a plurality of first through holes 13211, and the fixing posts 1322 are detachably connected to the first through holes 13211, so that the position of the fixing posts 1322 can be adjusted according to the size of the different mesh panels 12, thereby increasing the flexibility and adaptability of the device. The specific connection method can be provided with a threaded connection, or detachably fixed by a connecting piece such as a nut, which will not be described in detail here.

[0077] In this embodiment, Figure 3 and Figure 5 As shown, the positioning member 136 includes a fixing plate 1361, an extension plate 1362 and a fixing clip 1363. The fixing plate 1361 is located above the mesh plate 12, and the fixing plate 1361 is located below the fixing nut 1323, and the fixing plate 1361 is sleeved on the fixing column 1322; the extension plate 1362, one end of the extension plate 1362 is connected to the fixing plate 1361, and the extension plate 1362 is parallel to the plane where the outer ring 1321 is located. The design of the extension plate 1362 enables the fixing clip 1363 to be firmly fixed on the mesh plate 12; the fixing clip 1363 is connected to the bottom of the extension plate 1362, and the fixing clip 1363 is used to clamp the mesh plate 12 to prevent it from moving or falling off during the painting process.

[0078] The mesh plate 12 includes a frame 121 and a plurality of grid bars 122 arranged in a crisscross pattern in the frame 121 . The mesh plate 12 can be used to place the metal fastener 11 , so that the surface of the metal fastener 11 can be sprayed with paint.

[0079] The fixing clip 1363 includes a connecting portion 13631 and a clamping portion 13632. The connecting portion 13631 is located at the top of the fixing clip 1363 and is connected to the extension piece 1362. The clamping portion 13632 is located at the bottom of the fixing clip 1363 and includes two clamping feet arranged opposite to each other. The clamping feet are used to clamp and limit the position of the grid bar 122. The design of the clamping feet provides a firm clamping force for the grid bar 122 to prevent it from moving or falling off during the painting process.

[0080] The fixing clip 1363 in this embodiment is preferably made of ABS plastic or rubber or other thermoplastic polymer materials with high strength, good toughness and easy processing and molding. The grid bars 122 are clamped and fixed by the fixing clip 1363 to prevent the mesh plate 12 from falling off the rotating disk 132.

[0081] Combination Figure 5 and Figure 6In this embodiment, the fixing clip 1363 is provided with a limit hole 13633 and an installation channel 13634. The cross-sectional width of the limit hole 13633 is greater than the cross-sectional width of the installation channel 13634. The design of the limit hole 13633 and the installation channel 13634 enables the fixing clip 1363 to be conveniently installed on the mesh plate 12 while ensuring its firmness. When installing, the fixing clip 1363 is directly pressed downward, and the grid bar 122 passes through the installation channel 13634 and is stuck in the limit hole 13633. This installation method is simple and quick.

[0082] Furthermore, in this embodiment, the extension sheet 1362 is provided with a plurality of mounting holes 13621 in the extending direction, the plurality of mounting holes 13621 are interconnected, and the fixing clip 1363 is adjustably connected to the plurality of mounting holes 13621. The design of the mounting holes 13621 enables the fixing clip 1363 to be adjusted in position as required, thereby increasing the flexibility and adaptability of the device.

[0083] The top of the extension piece 1362 in this embodiment is provided with a receiving groove 13622, which is communicated with the mounting hole 13621, and the cross-sectional diameter of the receiving groove 13622 is larger than the cross-sectional diameter of the mounting hole 13621. The connecting portion 13631 is provided with a first limiting block 13635, which is received in the receiving groove 13622 to raise the contact surface between the fixing clip 1363 and the extension piece 1362, thereby preventing the fixing clip 1363 from being offset during use.

[0084] The bottom end of the extension piece 1362 in this embodiment is provided with a guide groove 13623, which is connected to the bottom end of the mounting hole 13621, and the straight line where the long side of the guide groove 13623 is located is parallel to the arrangement direction of the plurality of mounting holes 13621. The connecting portion 13631 is provided with a second limit block 13636. When the position of the fixing clip 1363 needs to be adjusted, the fixing clip 1363 is pulled upward so that the first limit block 13635 is located above the receiving groove 13622. At this time, the second limit block 13636 is located in the guide groove 13623 and slides along the guide groove 13623. The fixing clip 1363 can be adjusted between the plurality of mounting holes 13621.

[0085] In addition, the fixing clip 1363 structure in this embodiment can also adopt the structure of a spring clip fixed by a rope, and can be tied with the extension piece 1362 by a rope or fixed with two knots. The user can choose a suitable fixing method according to actual needs.

[0086] Combination Figure 2The support frame 131 in this embodiment includes a fixed rod 1311 and a movable rod 1312. One end of the movable rod 1312 is rotatably connected to the fixed rod 1311, and the other end of the movable rod 1312 is rotatably connected to the rotating disk 132. The support frame can be rotated to different set angles, so that the position of the rotating disk 132 can be adjusted up and down, which is convenient for loading and unloading operations of the mesh plate 12.

[0087] Further, a second driving member 1313 may be provided on the support frame 131 . The second driving member 1313 is provided on the fixed rod 1311 and connected to the movable rod 1312 . The second driving member 1313 drives the movable rod 1312 and the fixed rod 1311 to rotate relative to each other.

[0088] When the paint spraying device 13 of the present invention is used to spray the metal fastener 11 with water-based imitation leather paint, the metal fastener 11 to be sprayed is first mounted on the mesh plate 12, and the mesh plate 12 is mounted on the rotating disc 132. Then, the metal fastener 11 is sprayed with primer and water-based imitation leather paint by the spraying robot 134. During the spraying process, the rotating disc 132 can realize rotational motion through the first driving member 135, so that the spraying robot 134 sprays the surface of the metal fastener 11 at an inclined angle. After the spraying is completed, the mesh plate 12 with the metal fastener 11 is sent to the oven 14 for baking and curing. During the baking process, the primer and the water-based imitation leather paint are gradually cured to form a coating with an imitation leather feel and good weather resistance.

[0089] This completes the process of the water-based imitation leather paint spraying method for the metal fastener 11 of the preferred embodiment.

[0090] The first driving member 135 and the second driving member 1313 in this embodiment can adopt a rotary motor, a rotary cylinder or other equivalent driving structures, which have a mature technical basis and can stably and accurately realize the required driving functions. At the same time, the spraying manipulator 134 is designed as a three-axis driven mechanical arm structure, which has been widely used in the field of automated spraying. Its motion control and positioning accuracy can meet the requirements of high-precision spraying, and will not be described in detail here.

[0091] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A method for spraying water-based imitation leather paint for metal fasteners, characterized in that: include: S1: Hang the metal fastener on the mesh plate, then hang the mesh plate on the painting device, and spray the metal fastener through the spraying robot; S2: preparing and spraying a primer, wherein the primer comprises a polyester resin paint and a thinner; S3: Baking the primer so that the primer is not completely cured and a primer glue layer is formed; S4: preparing a water-based imitation leather paint, which specifically comprises: S41: mixing waterborne polyurethane resin, water, silicon dioxide, DPM film former, polydimethylsiloxane dispersion, polyamide wax, polyether siloxane copolymer and amine neutralizer to prepare waterborne imitation leather paint primer; S42: adding a curing agent and pure water to a water-based imitation leather paint base material to prepare a water-based imitation leather paint; S5: spraying water-based imitation leather paint: spraying water-based imitation leather paint on the surface of the primer adhesive layer; S6: baking the water-based imitation leather paint: putting the metal fastener sprayed with the water-based imitation leather paint into an oven for baking, so that the primer glue layer and the water-based imitation leather paint are cured to form a water-based imitation leather paint layer.

2. The method for spraying water-based imitation leather paint for metal fasteners according to claim 1, characterized in that: The ratio of the polyester resin paint to the diluent ranges from 1.0:0.5 to 1.0:1.

0.

3. The method for spraying water-based imitation leather paint for metal fasteners according to claim 1, characterized in that: The step S3 sets the baking temperature of the oven to 80-100° C. and the baking time to 20-30 minutes.

4. The method for spraying water-based imitation leather paint for metal fasteners according to claim 1, characterized in that: In terms of weight percentage, the proportion of the water-based imitation leather paint primer in the S71 is 70% to 80% of water-based polyurethane resin, 10% to 20% of water, 2% to 6% of silicon dioxide, 2% to 6% of DPM film-forming agent, 0.5% to 3% of polydimethylsiloxane dispersion, 0.5% to 3% of polyamide wax, 0.5% to 3% of polyether siloxane copolymer, and 0.1% to 1% of amine neutralizer.

5. The method for spraying water-based imitation leather paint for metal fasteners according to claim 4, characterized in that: The ratio of the water-based imitation leather paint primer to the curing agent to pure water is in the range of 10:2:1 to 10:2:

2.

6. The method for spraying water-based imitation leather paint for metal fasteners according to claim 1, characterized in that: In S6, the baking temperature of the oven is set to 110-150° C., and the baking time is set to 40-60 minutes.

7. The method for spraying water-based imitation leather paint for metal fasteners according to claim 1, characterized in that: The paint spraying device comprises: A liquid collecting tank is used to collect the paint liquid after spraying; A support frame, located on one side of the liquid collecting tank; The rotating disc is located above the liquid collecting tank and is rotatably connected to the support frame. The mesh plate is detachably arranged on the rotating disc, and different surfaces of the metal fastener are sprayed by a spraying manipulator.

8. The method for spraying water-based imitation leather paint for metal fasteners according to claim 7, characterized in that: The rotating disc comprises: An outer ring, connected to the support frame on both sides, and used to support the mesh plate; A fixed column is arranged on the outer ring, and the fixed column is provided with an external thread, and the mesh plate is sleeved on the outside of the fixed column; A positioning member, sleeved on the fixing column, the positioning member is located above the mesh plate; and A fixing nut is threadedly connected to the fixing column, and the fixing nut is used to limit the connection position of the positioning piece and the fixing column.

9. The method for spraying water-based imitation leather paint for metal fasteners according to claim 8, characterized in that: The positioning member comprises: A fixing plate, located above the mesh plate and below the fixing nut, and the fixing plate is sleeved on the fixing column; An extension piece, one end of which is connected to the fixing piece, and the extension piece is parallel to the plane where the outer ring is located; and A fixing clip is connected to the extension piece, and the fixing clip is used to clamp the mesh plate.

10. The method for spraying water-based imitation leather paint for metal fasteners according to claim 9, characterized in that: The mesh plate includes a frame and a plurality of grid bars arranged in a crisscross pattern in the frame; the fixing clip includes: A connecting portion, located at the top end of the fixing clip, the connecting portion being connected to the extension piece; and The clamping portion is located at the bottom end of the fixing clamp, and the clamping portion includes two clamping feet arranged opposite to each other, and the clamping feet are used to clamp and define the position of the grid bars.

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