Automatic paint spraying assembly line control method

Abstract

The invention discloses a bathroom cabinet production technology, and aims at providing an automatic paint spraying assembly line control method which is characterized by comprising the following steps: S1, product research and development; s2, blanking is carried out; s3, edge sealing; s4, punching is carried out; s5, plastering is conducted, specifically, plastering is conducted firstly after punching is conducted, surface flaws or holes are filled and flattened, non-toxic environment-friendly water-based putty is adopted as a plastering material, and the thickness of a plastering layer is controlled to range from 0.2 mm to 0.5 mm; s6, polishing is conducted, specifically, the plastered plate needs to be polished; the polished plate is subjected to paint spraying, environment-friendly water-based paint is adopted for paint spraying, the thickness of a spraying layer is controlled to range from 80 micrometers to 150 micrometers, the requirement for the spraying uniformity each time is larger than 90%, and it needs to be guaranteed that the surface of a paint film is smooth and free of bubbles and sagging in the spraying process; s8, assembling is conducted, specifically, the plates are assembled; and S9, warehousing. S10, quality detection: carrying out random spot check on all the products produced in batches again to check whether the products meet the requirements or not; the invention is suitable for the technical field of bathroom cabinet production.

Description

Technical Field

[0001] The present invention relates to a bathroom cabinet production technology, and more specifically, to an automatic painting production line control method. Background Art

[0002] At present, in the manufacturing process of bathroom cabinets, painting is an important surface treatment process, which requires strict standards such as spraying thickness, uniformity, and smoothness. In order to ensure the painting effect, factories usually use automatic painting equipment to improve the accuracy and consistency of spraying. Through a reasonable control system, various parameters in the spraying process, such as spraying pressure, spraying angle, spray gun distance, etc., can be accurately adjusted to ensure the quality of the paint layer. In addition, automatic control can also effectively avoid common problems in the painting process, such as paint bubbles, sagging, etc., thereby improving the appearance and durability of the final product. Therefore, the research and application of an efficient automatic painting line control method has become a vital part of modern bathroom cabinet production. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention aims to provide a method for controlling an automatic painting line with high production efficiency.

[0004] To achieve the above object, the present invention provides the following technical solution: an automatic painting line control method, comprising the following steps:

[0005] S1. Product research and development: According to market demand, user feedback and designer innovation, determine the appearance, function, size and material selection of bathroom cabinets, determine the technical parameters, usage standards and manufacturing process of each board of specific products, make and test samples to ensure that the samples meet the usage standards, and test the durability, environmental protection and safety of the samples;

[0006] S2, Cutting: According to the R&D design drawings, select suitable raw materials and cut or cut into shape. During the cutting process, ensure that the cutting accuracy error of each plate does not exceed ±0.5mm;

[0007] S3. Edge banding: The edges of the boards after cutting are edge banded. The edge banding materials include but are not limited to PVC, ABS, and PP. The edge banding materials are reasonably matched according to the type of boards used, and are edge banded by hot-melt edge banding, cold-pressed edge banding, or hot-pressed edge banding to ensure that the board surface is flat and smooth. The edge banding thickness is controlled between 0.5-2mm, and the bonding ratio of the edge banding material to the board is 2:1;

[0008] S4. Punching: Punch the plate according to the product design requirements, with precise hole position and diameter to ensure accurate fit during assembly. The punching tool is a fully automatic CNC punching machine with an accuracy control within ±0.1mm.

[0009] S5. Plastering: After drilling, plastering is first carried out to fill and level the surface defects or holes. The plastering material is non-toxic and environmentally friendly water-based putty, and the thickness of the plastering layer is controlled between 0.2-0.5mm;

[0010] S6. Grinding: The plate after plastering needs to be polished. Use sandpaper or automatic grinder to polish the surface of the plate after plastering to ensure that the surface is flat and smooth. The grinding particle size is controlled between P180-P240;

[0011] S7, spray painting: spray paint on the polished plates, use environmentally friendly water-based paint, the thickness of the spray layer is controlled between 80-150μm, and the uniformity of each spraying is required to be greater than 90%. During the spraying process, ensure that the paint film surface is flat, without bubbles and sagging;

[0012] S8, Assembly: Assemble the panels and use special tools and equipment to tightly connect the panels to ensure the stability and structural firmness of the assembled bathroom cabinet, and that the appearance meets the design requirements; after assembly, perform functional tests on each product to check whether each component is firmly installed and whether there is any looseness or instability;

[0013] S9, Warehouse, the assembled bathroom cabinets are quality checked, qualified products are packaged and classified according to specifications and models, ready for storage, unqualified products are repaired or reprocessed to ensure that the final product meets the standards;

[0014] S10, Quality Inspection: All mass-produced products are randomly inspected again to check whether they meet the following standards:

[0015] S101. Appearance inspection to ensure that the product has no flaws in appearance, the paint surface is smooth and uniform, and there are no bubbles or cracks; and check the edge sealing to ensure that the edge sealing has not fallen off and there are no obvious defects at the edge sealing;

[0016] S102, Dimension inspection, use calipers or micrometers to measure the main dimensions and ensure that the error is within ±0.5mm;

[0017] S103, strength testing, use a tensile testing machine to test the connection strength of the product connection to ensure that the tensile strength of each connection part meets the standard requirements;

[0018] S104. Products that pass the test can enter the market, and products that fail the test will be returned to the production line for repair or scrapping.

[0019] The present invention is further configured as follows: in S2, the raw materials include but are not limited to wood, particle board, density board, aluminum alloy, and the usage ratio of each material is adjusted according to product design requirements, the proportion of wood materials is ≥60%, and the proportion of other auxiliary materials is ≤10%.

[0020] The present invention is further configured as follows: in S3, the edge sealing method comprises the following steps:

[0021] S31, cutting the edge banding material into strips suitable for the edge length of the board;

[0022] S32. Use hot melt adhesive or ultra-high temperature adhesive to seal the edges, ensuring that the edge sealing material is tightly bonded to the surface of the board;

[0023] S33. During the edge sealing process, the temperature is controlled between 180°C and 220°C, and the edge sealing pressure is controlled between 50-100N / cm;

[0024] S34. After edge sealing, the board is cooled to room temperature to ensure that there are no bubbles or warping at the edge.

[0025] The present invention is further configured as follows: in said S5, the method for plastering comprises the following steps:

[0026] S51, in the putty paste formula for plastering, the ratio of resin to curing agent is 3:1, and the ratio of filler to resin is 1:3;

[0027] S52, evenly apply the putty paste on the surface of the plate to fill the holes and surface defects;

[0028] S53. After plastering, use a scraper to level the surface to ensure that the surface is smooth and free of bubbles. The drying time is 2-4 hours. After it is completely dry, polish it.

[0029] The present invention is further configured as follows: in S6, the grinding method comprises the following steps:

[0030] S61. Use 80-120 grit sandpaper to preliminarily sand the surface of the plastered board to remove excess putty on the surface;

[0031] S62, use 180-240 grit sandpaper for fine grinding to ensure a smooth surface;

[0032] S63. During the grinding process, the sandpaper should be evenly pressed to avoid excessive grinding that may damage the board.

[0033] S64. After polishing, wipe the surface with a damp cloth to ensure there is no dust or impurities.

[0034] The present invention is further configured as follows: in S7, the method for spraying paint comprises the following steps:

[0035] S71. Use high-quality environmentally friendly water-based paint, with a resin-to-curing agent ratio of 4:1 and a paint-to-thinner ratio of 1:0.2-0.3;

[0036] S72. Clean the surface before painting to ensure there is no oil, dust or impurities;

[0037] S73. During the painting process, the spray gun is 20-30cm away from the surface of the plate, the spraying angle is controlled between 30°-45°, and the spraying pressure is 0.3-0.4MPa;

[0038] S74, the thickness of each spray layer is controlled at 40-50μm, and 2-3 layers are sprayed. After each spraying, it is necessary to wait for ≥20min of drying time before the next spraying to ensure that the surface is uniform and smooth, and the paint film has no bubbles or scratches;

[0039] S75. After painting, place the board in a drying room for natural air drying for ≥ 8 hours to ensure that the paint surface is completely dry. After it is dry, proceed with subsequent assembly operations.

[0040] The present invention is further configured as follows: in S8, the assembling method comprises the following steps:

[0041] S81. Match the punched plate with other accessories to ensure the sizes match;

[0042] S82. Use special tools to fix each plate, and control the torque of the screws between 5-8N / m;

[0043] S83. After assembly, perform functional testing to ensure that each component is firmly connected and not loose.

[0044] The beneficial effects of the present invention are:

[0045] 1. Compared with the prior art, the automatic painting line control method of the present invention can effectively ensure the quality and stability of the product through detailed planning and strict control of the entire production process; starting from the product research and development stage, through market demand analysis and sample testing, it is ensured that the product design meets consumer needs and meets the use standards. In each step of cutting, edge sealing, punching, painting, etc., there are detailed process requirements, precise operation accuracy control and use of suitable materials, so that each link of the product can meet strict quality standards; the design of the entire production process not only ensures the appearance quality of the product, but also pays attention to the functional integrity, durability and environmental protection, thereby improving the market competitiveness and consumer satisfaction of bathroom cabinets.

[0046] 2. The automatic painting line control method of the present invention ensures the structural stability and cost-effectiveness of the product by clarifying the selection and proportion control of raw materials; the proportion of wood materials ≥60% can effectively improve the overall strength and service life of the bathroom cabinet. At the same time, the wood material has good moisture resistance and decorative effect, and can meet the common humidity changes in the bathroom environment; by allocating other auxiliary materials, such as particleboard, density board, aluminum alloy, etc., the proportion is ≤10%, which not only helps to reduce production costs, but also ensures the diversity and functionality of materials, avoiding material waste and unnecessary cost increase; fully considers the balance between performance and cost, avoids the problems caused by over-reliance on a single material, and helps to improve the controllability and production efficiency of production.

[0047] 3. In the present invention, the flatness and firmness of the edge sealing of the board are ensured through precise edge sealing process control; by cutting the edge sealing material and using hot melt adhesive or ultra-high temperature adhesive for edge sealing, it can be ensured that the edge sealing material is tightly combined with the surface of the board and is not easy to fall off, thereby effectively improving the moisture resistance, waterproofness and durability of the board, and avoiding the shortening of the service life due to loose or falling edge sealing; strictly controlling the temperature and pressure during the edge sealing process can ensure that the bonding effect between the edge sealing material and the board is optimal, and avoiding the problems of bubbles and warping that may occur during the edge sealing process; in addition, by further checking the edge sealing effect after cooling to room temperature, the quality of the product is further guaranteed, thereby ensuring the flatness and smoothness of the product appearance, and enhancing the consumer's experience.

[0048] 4. In the present invention, scientific formula proportions and operating steps are adopted to effectively ensure the uniformity and strength of the plaster layer; by reasonably preparing the ratio of resin to curing agent, filler to resin in the putty paste, it is ensured that the hardness of the putty layer after plastering is moderate and it is not easy to crack or fall off, thereby improving the surface quality and service life of the board; after plastering, a scraper is used for leveling to ensure that the surface is bubble-free and smooth, avoiding surface defects from affecting the painting effect, and the drying time after plastering is controlled within 2-4 hours, which fully guarantees the drying quality of the putty layer and makes the subsequent polishing process smoother, thereby effectively improving the surface aesthetics and functionality of the entire product. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 The present invention is a flow chart of the automatic painting line control method. DETAILED DESCRIPTION

[0050] Reference Figure 1 The automatic painting line control method of the present invention is further described in detail.

[0051] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0052] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0053] Figure 1 The automatic painting line control method shown includes the following steps:

[0054] S1. Product research and development: According to market demand, user feedback and designer innovation, determine the appearance, function, size and material selection of bathroom cabinets, determine the technical parameters, usage standards and manufacturing process of each board of specific products, make and test samples to ensure that the samples meet the usage standards, and test the durability, environmental protection and safety of the samples;

[0055] S2, Cutting: According to the R&D design drawings, select suitable raw materials and cut or cut into shape. During the cutting process, ensure that the cutting accuracy error of each plate does not exceed ±0.5mm;

[0056] S3. Edge banding: The edges of the boards after cutting are edge banded. The edge banding materials include but are not limited to PVC, ABS, and PP. The edge banding materials are reasonably matched according to the type of boards used, and are edge banded by hot-melt edge banding, cold-pressed edge banding, or hot-pressed edge banding to ensure that the board surface is flat and smooth. The edge banding thickness is controlled between 0.5-2mm, and the bonding ratio of the edge banding material to the board is 2:1;

[0057] S4. Punching: Punch the plate according to the product design requirements, with precise hole position and diameter to ensure accurate fit during assembly. The punching tool is a fully automatic CNC punching machine with an accuracy control within ±0.1mm.

[0058] S5. Plastering: After drilling, plastering is first carried out to fill and level the surface defects or holes. The plastering material is non-toxic and environmentally friendly water-based putty, and the thickness of the plastering layer is controlled between 0.2-0.5mm;

[0059] S6. Grinding: The plate after plastering needs to be polished. Use sandpaper or automatic grinder to polish the surface of the plate after plastering to ensure that the surface is flat and smooth. The grinding particle size is controlled between P180-P240;

[0060] S7, spray painting: spray paint on the polished plates, use environmentally friendly water-based paint, the thickness of the spray layer is controlled between 80-150μm, and the uniformity of each spraying is required to be greater than 90%. During the spraying process, ensure that the paint film surface is flat, without bubbles and sagging;

[0061] S8, Assembly: Assemble the panels and use special tools and equipment to tightly connect the panels to ensure the stability and structural firmness of the assembled bathroom cabinet, and that the appearance meets the design requirements; after assembly, perform functional tests on each product to check whether each component is firmly installed and whether there is any looseness or instability;

[0062] S9, Warehouse, the assembled bathroom cabinets are quality checked, qualified products are packaged and classified according to specifications and models, ready for storage, unqualified products are repaired or reprocessed to ensure that the final product meets the standards;

[0063] S10, Quality Inspection: All mass-produced products are randomly inspected again to check whether they meet the following standards:

[0064] S101. Appearance inspection to ensure that the product has no flaws in appearance, the paint surface is smooth and uniform, and there are no bubbles or cracks; and check the edge sealing to ensure that the edge sealing has not fallen off and there are no obvious defects at the edge sealing;

[0065] S102, Dimension inspection, use calipers or micrometers to measure the main dimensions and ensure that the error is within ±0.5mm;

[0066] S103, strength testing, use a tensile testing machine to test the connection strength of the product connection to ensure that the tensile strength of each connection part meets the standard requirements;

[0067] S104. Products that pass the test can enter the market, and products that fail the test will be returned to the production line for repair or scrapping;

[0068] Compared with the prior art, the automatic painting line control method of the present invention can effectively ensure the quality and stability of the product through detailed planning and strict control of the entire production process; starting from the product research and development stage, through market demand analysis and sample testing, it is ensured that the product design meets consumer needs and meets the usage standards. In each step of cutting, edge sealing, punching, painting, etc., there are detailed process requirements, precise operation accuracy control and use of suitable materials, so that each link of the product can meet strict quality standards; the design of the entire production process not only ensures the appearance quality of the product, but also pays attention to the functional integrity, durability and environmental protection, thereby improving the market competitiveness and consumer satisfaction of bathroom cabinets.

[0069] In S2, the raw materials include but are not limited to wood, particleboard, density board, and aluminum alloy, and the proportion of each material is adjusted according to the product design requirements, the proportion of wood materials is ≥ 60%, and the proportion of other auxiliary materials is ≤ 10%;

[0070] By clarifying the selection and proportion control of raw materials, the structural stability and cost-effectiveness of the product are ensured; the proportion of wood materials ≥60% can effectively improve the overall strength and service life of the bathroom cabinet. At the same time, the wood material has good moisture resistance and decorative effects, and can meet the common humidity changes in the bathroom environment; by allocating other auxiliary materials, such as particleboard, density board, aluminum alloy, etc., the proportion is ≤10%, which not only helps to reduce production costs, but also ensures the diversity and functionality of materials, avoiding material waste and unnecessary cost increases; fully considering the balance between performance and cost, avoiding the problems caused by over-reliance on a single material, and helping to improve production controllability and production efficiency.

[0071] In S3, the edge sealing method comprises the following steps:

[0072] S31, cutting the edge banding material into strips suitable for the edge length of the board;

[0073] S32. Use hot melt adhesive or ultra-high temperature adhesive to seal the edges, ensuring that the edge sealing material is tightly bonded to the surface of the board;

[0074] S33. During the edge sealing process, the temperature is controlled between 180°C and 220°C, and the edge sealing pressure is controlled between 50-100N / cm;

[0075] S34. The board after edge sealing is cooled to room temperature to ensure that there are no bubbles or warping at the edge sealing;

[0076] Through precise edge banding process control, the flatness and firmness of the board edge banding are ensured; by cutting the edge banding material and using hot melt adhesive or ultra-high temperature adhesive for edge banding, it can be ensured that the edge banding material is tightly bonded to the board surface and is not easy to fall off, which effectively improves the moisture-proof, waterproof and durability of the board, and avoids the shortening of the service life caused by loose or falling edge banding. Strict control of temperature and pressure during the edge banding process can ensure the best bonding effect between the edge banding material and the board, and avoid bubbles and warping problems that may occur during the edge banding process; in addition, by further checking the edge banding effect after cooling to room temperature, the quality of the product is further guaranteed, thereby ensuring the flatness and smoothness of the product appearance and enhancing the consumer's experience.

[0077] In the S5, the method for plastering comprises the following steps:

[0078] S51, in the putty paste formula for plastering, the ratio of resin to curing agent is 3:1, and the ratio of filler to resin is 1:3;

[0079] S52, evenly apply the putty paste on the surface of the plate to fill the holes and surface defects;

[0080] S53. After plastering, use a scraper to level the surface to ensure that the surface is smooth and free of bubbles. The drying time is 2-4 hours. After it is completely dry, polish it.

[0081] The scientific formula ratio and operation steps are adopted to effectively ensure the uniformity and strength of the putty layer; by reasonably preparing the ratio of resin and curing agent, filler and resin in the putty paste, the hardness of the putty layer after plastering is ensured to be moderate and not easy to crack or fall off, thereby improving the surface quality and service life of the board; after plastering, a scraper is used for leveling to ensure that the surface is bubble-free and smooth, avoiding surface defects that affect the painting effect, and the drying time after plastering is controlled within 2-4 hours, which fully guarantees the drying quality of the putty layer and makes the subsequent polishing process smoother, thereby effectively improving the surface aesthetics and functionality of the entire product.

[0082] In S6, the grinding method comprises the following steps:

[0083] S61. Use 80-120 grit sandpaper to preliminarily sand the surface of the plastered board to remove excess putty on the surface;

[0084] S62, use 180-240 grit sandpaper for fine grinding to ensure a smooth surface;

[0085] S63. During the grinding process, the sandpaper should be evenly pressed to avoid excessive grinding that may damage the board.

[0086] S64. After polishing, wipe the surface with a damp cloth to ensure there is no dust or impurities.

[0087] By using sandpaper of different particle sizes in stages, the flatness and smoothness of the board surface are ensured; 80-120 mesh sandpaper is used for initial grinding to effectively remove excess putty and smooth the surface; 180-240 mesh sandpaper is used for subsequent fine grinding to further refine the surface and ensure a smooth and uniform surface after painting; during the grinding process, uniform pressure is applied to avoid damage to the board due to excessive grinding and possible dents or unevenness; the surface is wiped with a wet cloth to ensure that there is no dust and impurities on the surface, providing good surface conditions for the painting process, ensuring the adhesion of the paint and the flatness of the paint surface; the reasonable arrangement of the overall grinding process greatly improves the appearance quality of the product and the smooth progress of subsequent processes, effectively enhancing the market competitiveness of the product.

[0088] In S7, the method for spraying paint comprises the following steps:

[0089] S71. Use high-quality environmentally friendly water-based paint, with a resin-to-curing agent ratio of 4:1 and a paint-to-thinner ratio of 1:0.2-0.3;

[0090] S72. Clean the surface before painting to ensure there is no oil, dust or impurities;

[0091] S73. During the painting process, the spray gun is 20-30cm away from the surface of the plate, the spraying angle is controlled between 30°-45°, and the spraying pressure is 0.3-0.4MPa;

[0092] S74, the thickness of each spray layer is controlled at 40-50μm, and 2-3 layers are sprayed. After each spraying, it is necessary to wait for ≥20min of drying time before the next spraying to ensure that the surface is uniform and smooth, and the paint film has no bubbles or scratches;

[0093] S75. After painting, place the board in a drying room for natural air drying for ≥ 8 hours to ensure that the paint surface is completely dry. After it is dry, proceed with subsequent assembly operations.

[0094] High-quality environmentally friendly water-based paint is used, and the paint ratio is strictly controlled to ensure that the paint surface is smooth, uniform and environmentally friendly; the board is cleaned before painting to thoroughly remove oil and impurities to ensure the adhesion of the paint. By controlling the distance between the spray gun and the board, the spraying angle and the spraying pressure, an efficient and uniform spraying effect can be achieved, avoiding bubbles, sagging or unevenness on the paint surface. The thickness of each spray layer is controlled at 40-50μm to ensure the uniformity of the paint film, and each layer is waited for full drying after spraying to make the paint surface more solid and smooth; through natural drying in the air-drying room, the paint surface is ensured to be completely dry, thereby improving the appearance quality and durability of the bathroom cabinet, avoiding peeling or damage to the paint surface, and enhancing the market competitiveness of the product.

[0095] In S8, the assembling method comprises the following steps:

[0096] S81. Match the punched plate with other accessories to ensure the sizes match;

[0097] S82. Use special tools to fix each plate, and control the torque of the screws between 5-8N / m;

[0098] S83. After assembly, perform functional testing to ensure that each component is firmly connected and not loose;

[0099] Focusing on precise matching and fixing ensures the structural firmness and stability of the bathroom cabinet. By accurately matching the punched panels with other accessories, assembly problems caused by size mismatch are avoided, ensuring the integrity and stability of the product. Special tools are used to tighten each panel and control the torque of the screws to avoid over-tightening or loosening, improving the strength and stability of the connection. Functional testing is carried out after assembly to ensure that each component is firmly connected without looseness or instability, effectively ensuring the quality and durability of the product.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for an automatic painting line, characterized in that: The following steps are involved: S1. Product research and development: According to market demand, user feedback and designer innovation, determine the appearance, function, size and material selection of bathroom cabinets, determine the technical parameters, usage standards and manufacturing process of each board of specific products, make and test samples to ensure that the samples meet the usage standards, and test the durability, environmental protection and safety of the samples; S2, Cutting: According to the R&D design drawings, select suitable raw materials and cut or cut into shape. During the cutting process, ensure that the cutting accuracy error of each plate does not exceed ±0.5mm; S3. Edge banding: The edges of the boards after cutting are edge banded. The edge banding materials include but are not limited to PVC, ABS, and PP. The edge banding materials are reasonably matched according to the type of boards used, and are edge banded by hot-melt edge banding, cold-pressed edge banding, or hot-pressed edge banding to ensure that the board surface is flat and smooth. The edge banding thickness is controlled between 0.5-2mm, and the bonding ratio of the edge banding material to the board is 2:1; S4. Punching: Punch the plate according to the product design requirements, with precise hole position and diameter to ensure accurate fit during assembly. The punching tool is a fully automatic CNC punching machine with an accuracy control within ±0.1mm. S5. Plastering: After drilling, plastering is first carried out to fill and level the surface defects or holes. The plastering material is non-toxic and environmentally friendly water-based putty, and the thickness of the plastering layer is controlled between 0.2-0.5mm; S6. Grinding: The plate after plastering needs to be polished. Use sandpaper or automatic grinder to polish the surface of the plate after plastering to ensure that the surface is flat and smooth. The grinding particle size is controlled between P180-P240; S7, spray painting: spray paint on the polished plates, use environmentally friendly water-based paint, the thickness of the spray layer is controlled between 80-150μm, and the uniformity of each spraying is required to be greater than 90%. During the spraying process, ensure that the paint film surface is flat, without bubbles and sagging; S8, Assembly: Assemble the panels and use special tools and equipment to tightly connect the panels to ensure the stability and structural firmness of the assembled bathroom cabinet, and that the appearance meets the design requirements; after assembly, perform functional tests on each product to check whether each component is firmly installed and whether there is any looseness or instability; S9, Warehouse, the assembled bathroom cabinets are quality checked, qualified products are packaged and classified according to specifications and models, ready for storage, unqualified products are repaired or reprocessed to ensure that the final product meets the standards; S10, Quality Inspection: All mass-produced products are randomly inspected again to check whether they meet the following standards: S101. Appearance inspection to ensure that the product has no flaws in appearance, the paint surface is smooth and uniform, and there are no bubbles or cracks; and check the edge sealing to ensure that the edge sealing has not fallen off and there are no obvious defects at the edge sealing; S102, Dimension inspection, use calipers or micrometers to measure the main dimensions and ensure that the error is within ±0.5mm; S103, strength testing, use a tensile testing machine to test the connection strength of the product connection to ensure that the tensile strength of each connection part meets the standard requirements; S104. Products that pass the test can enter the market, and products that fail the test will be returned to the production line for repair or scrapping.

2. The automatic painting line control method according to claim 1, characterized in that: In S2, the raw materials include but are not limited to wood, particle board, density board, and aluminum alloy, and the proportion of each material is adjusted according to the product design requirements, the proportion of wood materials is ≥60%, and the proportion of other auxiliary materials is ≤10%.

3. The automatic painting line control method according to claim 1, characterized in that: In S3, the edge sealing method comprises the following steps: S31, cutting the edge banding material into strips suitable for the edge length of the board; S32. Use hot melt adhesive or ultra-high temperature adhesive to seal the edges, ensuring that the edge sealing material is tightly bonded to the surface of the board; S33. During the edge sealing process, the temperature is controlled between 180°C and 220°C, and the edge sealing pressure is controlled between 50-100N / cm; S34. After edge sealing, the board is cooled to room temperature to ensure that there are no bubbles or warping at the edge.

4. The automatic painting line control method according to claim 1, characterized in that: In the S5, the method for plastering comprises the following steps: S51, in the putty paste formula for plastering, the ratio of resin to curing agent is 3:1, and the ratio of filler to resin is 1:3; S52, evenly apply the putty paste on the surface of the plate to fill the holes and surface defects; S53. After plastering, use a scraper to level the surface to ensure that the surface is smooth and free of bubbles. The drying time is 2-4 hours. After it is completely dry, polish it.

5. The automatic painting line control method according to claim 1, characterized in that: In S6, the grinding method comprises the following steps: S61. Use 80-120 grit sandpaper to preliminarily sand the surface of the plastered board to remove excess putty on the surface; S62, use 180-240 grit sandpaper for fine grinding to ensure a smooth surface; S63. During the grinding process, the sandpaper should be evenly pressed to avoid excessive grinding that may damage the board. S64. After polishing, wipe the surface with a damp cloth to ensure there is no dust or impurities.

6. The automatic painting line control method according to claim 1, characterized in that: In S7, the method for spraying paint comprises the following steps: S71. Use high-quality environmentally friendly water-based paint, with a resin-to-curing agent ratio of 4:1 and a paint-to-thinner ratio of 1:0.2-0.3; S72. Clean the surface before painting to ensure there is no oil, dust or impurities; S73. During the painting process, the spray gun is 20-30cm away from the surface of the plate, the spraying angle is controlled between 30°-45°, and the spraying pressure is 0.3-0.4MPa; S74, the thickness of each spray layer is controlled at 40-50μm, and 2-3 layers are sprayed. After each spraying, it is necessary to wait for ≥20min of drying time before the next spraying to ensure that the surface is uniform and smooth, and the paint film has no bubbles or scratches; S75. After painting, place the board in a drying room for natural air drying for ≥ 8 hours to ensure that the paint surface is completely dry. After it is dry, proceed with subsequent assembly operations.

7. The automatic painting line control method according to claim 1, characterized in that: In 8, the assembly method comprises the following steps: S81. Match the punched plate with other accessories to ensure the sizes match; S82. Use special tools to fix each plate, and control the torque of the screws between 5-8N / m; S83. After assembly, perform functional testing to ensure that each component is firmly connected and not loose.

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