Wood grain electrophoretic spraying process for aluminum profile

Abstract

The invention discloses a wood grain electrophoretic spraying process for an aluminum profile, which comprises the following steps: sanding the surface of the aluminum profile, cleaning the surface of the aluminum profile, and then drying; the surface of the aluminum profile is evenly coated with environment-friendly primer in a spraying mode, wood grain printing ink is sprayed to the surface of the primer layer through spraying equipment, and a coating with the wood grain texture is formed; before the wood grain paint is dried, a special wood grain tool is used for dragging the paint surface to achieve the required wood grain effect; the aluminum profile sprayed with the wood grains is immersed in an electrophoresis tank, so that the electrophoretic paint forms a uniform and compact electrophoretic coating on the surface of the aluminum profile; and putting the aluminum profile subjected to electrophoretic coating into a drying furnace. The process is simple and convenient, and the production efficiency of the wood grain aluminum profile is improved; the electrophoretic coating technology is adopted, it is guaranteed that the coating is stable in quality and high in adhesive force, the surface of the aluminum profile is effectively prevented from falling off in daily use, and the durability of the paint surface of the surface of the aluminum profile is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum profile processing, in particular to a wood grain electrophoresis spraying process for aluminum profiles. Background Art

[0002] Industrial aluminum profile is an alloy material with aluminum as the main component. Aluminum rods are melted and extruded to obtain aluminum materials with different cross-sectional shapes. However, the proportion of the added alloy is different, and the mechanical properties and application fields of the industrial aluminum profiles produced are also different. Application fields Generally speaking, industrial aluminum profiles refer to all aluminum profiles except for building doors and windows, curtain walls, indoor and outdoor decorations, and building structures. Aluminum profile is a lightweight material widely used in construction, furniture, transportation and other fields. It has good plasticity, electrical conductivity, thermal conductivity and corrosion resistance.

[0003] In recent years, wood grain aluminum profiles have become increasingly popular in the market due to their beautiful appearance, realistic texture and easy maintenance. However, the traditional wood grain treatment process is complicated and inefficient, and the wood grain coating sprayed on the surface is prone to fall off during long-term use, resulting in poor durability. Therefore, a wood grain electrophoretic spraying process for aluminum profiles is proposed. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the present invention provides a wood grain electrophoretic spraying process for aluminum profiles, which solves the problems that: the traditional wood grain processing process is complicated and inefficient, and the wood grain coating sprayed on the surface is easy to fall off during long-term use, resulting in poor durability. The process of the present invention is simple and convenient, and the production efficiency of wood grain aluminum profiles is improved; the electrophoretic coating technology is used to ensure stable coating quality and strong adhesion, effectively prevent the aluminum profile surface from falling off during daily use, and improve the durability of the paint surface of the aluminum profile.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A wood grain electrophoretic spraying process for aluminum profiles, characterized in that the wood grain electrophoretic spraying process for aluminum profiles comprises the following steps:

[0008] Step 1: Pretreatment of aluminum profile surface: sand the aluminum profile surface, degrease the surface with a degreasing agent to remove residual grease and grinding fluid, clean the aluminum profile surface, rinse with water, and then dry it;

[0009] Step 2: Primer spraying: Apply the environmentally friendly primer evenly on the surface of the aluminum profile by spraying to form a primer layer with good adhesion and wear resistance;

[0010] Step 3: Wood grain spraying: Use spraying equipment to spray wood grain ink onto the surface of the primer layer to form a coating with wood grain texture. When spraying, the spraying distance, spraying speed and spraying pressure must be controlled to ensure the natural and realistic wood grain effect.

[0011] Step 4: Wood grain effect processing: Before the wood grain paint dries, use a special wood grain tool to drag the desired wood grain effect on the paint surface, and adjust the direction and thickness of the wood grain as needed;

[0012] Step 5: Electrophoretic coating: Immerse the aluminum profile with wood grain sprayed in the electrophoretic tank, use a DC power supply to apply voltage between the aluminum profile and the electrophoretic paint, so that the electrophoretic paint forms a uniform and tight electrophoretic coating on the surface of the aluminum profile;

[0013] Step 6: Drying and curing: Place the aluminum profile after electrophoretic coating into a drying furnace. After drying, the coating forms a protective layer with moderate hardness and good wear resistance.

[0014] As a further preferred embodiment of the present invention, the sanding treatment in step 1 is performed using 700-1000 mesh sandpaper or grinding wheel to remove oil stains, oxide layer and impurities on the surface of the aluminum profile, improve coating adhesion, and prevent the primer from falling off the surface of the aluminum profile.

[0015] As a further preferred embodiment of the present invention, the thickness of the primer layer in step 2 is controlled at 20-30 microns, and the primer layer is evenly sprayed on the surface of the aluminum profile using epoxy primer or acrylic primer, which can enhance the adhesion, durability and corrosion resistance of subsequent coatings.

[0016] As a further preferred embodiment of the present invention, the spraying distance in step three is controlled at 15-25 cm, and the spraying speed is controlled at 1-2 square meters per minute to avoid excessive overlapping or missing coating, which can effectively improve the presentation of wood grain paint on the surface of aluminum profiles and ensure the quality of paint spraying.

[0017] As a further preferred embodiment of the present invention, the wood grain tool in step four is one or more of a wood grain brush, a sponge brush, a sponge strip, and a steel scraper. By dragging the wood grain tool on the painted surface of the aluminum profile, different texture effects can be created to increase the sense of layering.

[0018] As a further preferred embodiment of the present invention, the voltage in step five is controlled at 50V-400V, which is convenient for controlling the deposition rate and coating thickness of the coating on the metal surface, the thickness of the electrophoretic coating is controlled at 15-25 microns, and the current is controlled between 1A-10A, which is convenient for electrophoretic coating of aluminum profiles of different sizes and dimensions, thereby improving the versatility of aluminum profile processing.

[0019] As a further preferred embodiment of the present invention, the drying furnace in step six adopts a hot air circulation drying method, the drying temperature is controlled at 160-180°C, and the drying time is 30-40 minutes, so as to improve the efficiency and effect of drying the profile surface coating and ensure that the coating is dried and solidified.

[0020] (III) Beneficial effects

[0021] The present invention provides a wood grain electrophoretic spraying process for aluminum profiles. It has the following beneficial effects:

[0022] 1. The process of the present invention is simple and convenient, and the production efficiency of the wood grain aluminum profile is improved; the electrophoretic coating technology is adopted to ensure the stable quality of the coating and strong adhesion, which effectively prevents the aluminum profile surface from falling off during daily use and improves the durability of the aluminum profile surface paint.

[0023] 2. The present invention uses environmentally friendly primer and wood grain ink, which reduces environmental pollution; the wood grain effect is realistic, and has high decorativeness and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic flow chart of the steps of the wood grain electrophoretic spraying process of the aluminum profile of the present invention. DETAILED DESCRIPTION

[0025] 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 , the embodiment of the present invention provides a technical solution:

[0027] Embodiment 1

[0028] 1. First, use 700-grit sandpaper to sand the surface of the aluminum profile to remove the oxide layer, oil stains and impurities. Then, use a degreasing agent to degrease the surface of the aluminum profile to remove residual grease and grinding fluid, then rinse it with water and dry it;

[0029] 2. Apply the environmentally friendly primer evenly on the surface of the aluminum profile by spraying to form a 20-micron thick primer layer, thereby improving the coating adhesion and wear resistance on the surface of the aluminum profile;

[0030] 3. Use spraying equipment to spray wood grain ink onto the surface of the primer layer to form a coating with wood grain texture. During the spraying process, control the spraying distance from the aluminum profile surface to 15 cm and the spraying speed to 1 square meter per minute to ensure that the wood grain effect is natural and realistic;

[0031] 4. Before the wood grain paint dries, use a wood grain brush or sponge brush to drag the painted surface of the aluminum profile. Use a wood grain brush to create a wood grain effect, and use a sponge brush to create a texture effect, and adjust the direction and thickness of the wood grain as needed;

[0032] 5. Immerse the aluminum profile sprayed with wood grain in the electrophoretic tank, and use a 50V DC power supply to apply voltage between the aluminum profile and the electrophoretic paint, so that the electrophoretic paint forms a 15-micron-thick, uniform, and tight electrophoretic coating on the surface of the aluminum profile;

[0033] 6. Finally, put the aluminum profile after electrophoretic coating into the drying furnace for hot air circulation drying. The temperature is controlled at 160°C and the drying time is 40 minutes. After drying, the coating forms a protective layer with moderate hardness and good wear resistance.

[0034] The present invention uses low-mesh sandpaper to grind the surface of the aluminum profile to make the surface roughness of the aluminum profile larger, which can improve the adhesion between the primer and the surface of the aluminum profile, but the surface flatness of the primer needs to be improved. By spraying wood grain paint at a close and slow speed, the flatness of the wood grain paint on the surface of the aluminum profile and the paint effect can be effectively improved, but it is also easy to cause the paint surface to be too thick. By using a lower voltage to perform electrophoresis processing on the aluminum profile, the electrophoretic coating is thinner and the electrophoresis time is longer. Although the durability of the paint surface on the aluminum profile is improved, the processing efficiency needs to be improved.

[0035] Embodiment 2

[0036] 1. First, use 900-grit sandpaper to sand the surface of the aluminum profile to remove the oxide layer, oil stains and impurities. Then, use a degreasing agent to degrease the surface of the aluminum profile to remove residual grease and grinding fluid, then rinse it with water and dry it;

[0037] 2. Apply the environmentally friendly primer evenly on the surface of the aluminum profile by spraying to form a 25-micron thick primer layer, thereby improving the coating adhesion and wear resistance on the surface of the aluminum profile;

[0038] 3. Use spraying equipment to spray wood grain ink onto the surface of the primer layer to form a coating with wood grain texture. During the spraying process, control the spraying distance from the aluminum profile surface to 20 cm and the spraying speed to 1.5 square meters per minute to ensure that the wood grain effect is natural and realistic;

[0039] 4. Before the wood grain paint dries, use a wood grain brush or sponge brush to drag the painted surface of the aluminum profile. Use a wood grain brush to create a wood grain effect, and use a sponge brush to create a texture effect, and adjust the direction and thickness of the wood grain as needed;

[0040] 5. Immerse the aluminum profile sprayed with wood grain in the electrophoretic tank, and use a 200V DC power supply to apply voltage between the aluminum profile and the electrophoretic paint, so that the electrophoretic paint forms a 20-micron-thick, uniform, and tight electrophoretic coating on the surface of the aluminum profile;

[0041] 6. Finally, put the aluminum profile after electrophoretic coating into the drying furnace for hot air circulation drying. The temperature is controlled at 170°C and the drying time is 35 minutes. After drying, the coating forms a protective layer with moderate hardness and good wear resistance.

[0042] The present invention uses sandpaper with medium mesh to grind the surface of the aluminum profile so that the surface roughness of the aluminum profile is moderate, which can improve the adhesion between the primer and the surface of the aluminum profile, and the primer surface has good flatness. By spraying wood grain paint at a long distance and at a moderate speed, the flatness of the wood grain paint on the surface of the aluminum profile and the paint surface effect can be effectively improved. By using a medium voltage to perform electrophoresis processing on the aluminum profile, the electrophoretic coating layer is moderate and the electrophoresis time is short, which significantly improves the durability of the paint surface on the surface of the aluminum profile, and the production and processing speed is fast, which is suitable for mass production.

[0043] Embodiment 3

[0044] 1. First, use 1000-grit sandpaper to sand the surface of the aluminum profile to remove the oxide layer, oil stains and impurities. Then, use a degreasing agent to degrease the surface of the aluminum profile to remove residual grease and grinding fluid, then rinse it with water and dry it;

[0045] 2. Apply the environmentally friendly primer evenly on the surface of the aluminum profile by spraying to form a 30-micron thick primer layer, thereby improving the coating adhesion and wear resistance on the surface of the aluminum profile;

[0046] 3. Use spraying equipment to spray wood grain ink onto the surface of the primer layer to form a coating with wood grain texture. During the spraying process, control the spraying distance from the aluminum profile surface to 25cm and the spraying speed to 2 square meters per minute to ensure that the wood grain effect is natural and realistic;

[0047] 4. Before the wood grain paint dries, use a wood grain brush or sponge brush to drag the painted surface of the aluminum profile. Use a wood grain brush to create a wood grain effect, and use a sponge brush to create a texture effect, and adjust the direction and thickness of the wood grain as needed;

[0048] 5. Immerse the aluminum profile sprayed with wood grain in the electrophoretic tank, and use a 400V DC power supply to apply voltage between the aluminum profile and the electrophoretic paint, so that the electrophoretic paint forms a 25-micron-thick, uniform, and tight electrophoretic coating on the surface of the aluminum profile;

[0049] 6. Finally, put the aluminum profile after electrophoretic coating into the drying furnace for hot air circulation drying. The temperature is controlled at 180°C and the drying time is 30 minutes. After drying, the coating forms a protective layer with moderate hardness and good wear resistance.

[0050] The present invention uses high-mesh sandpaper to polish the surface of the aluminum profile, so that the surface roughness of the aluminum profile is not obvious. Although the surface flatness of the primer is good, the adhesion between the primer and the surface of the aluminum profile is general, and it is easy to fall off when it is bumped during use. By spraying wood grain paint at a longer distance and at a faster speed, the uniformity of the wood grain paint on the surface of the aluminum profile and the paint effect can be effectively improved. By using a higher voltage to perform electrophoresis processing on the aluminum profile, it is easy to make the electrophoretic coating thicker and the electrophoretic processing time shorter. Although the durability of the paint surface on the aluminum profile is improved, the power consumption of the electrophoretic equipment in production is relatively large, which is easy to cause a large load on the electrophoretic equipment, which is not conducive to processing and production.

[0051] Problem to be solved by the invention Wood-grain aluminum profiles are increasingly favored by the market due to their beautiful appearance, realistic texture and easy maintenance. However, the traditional wood-grain processing process is complicated and inefficient, and the wood-grain coating sprayed on the surface is prone to fall off during long-term use, resulting in poor durability. The process of the invention is simple and improves the production efficiency of wood-grain aluminum profiles; the electrophoretic coating technology is used to ensure stable coating quality and strong adhesion, effectively preventing the aluminum profile surface from falling off during daily use, and improving the durability of the aluminum profile surface paint. The use of environmentally friendly primer and wood-grain ink reduces environmental pollution; the wood-grain effect is realistic, and has high decorativeness and practicality.

[0052] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0054] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wood grain electrophoretic spraying process for aluminum profiles, characterized by: The wood grain electrophoretic spraying process of the aluminum profile comprises the following steps: Step 1: Pretreatment of aluminum profile surface: sand the aluminum profile surface, degrease the surface with a degreasing agent to remove residual grease and grinding fluid, clean the aluminum profile surface, rinse with water, and then dry it; Step 2: Primer spraying: Apply the environmentally friendly primer evenly on the surface of the aluminum profile by spraying to form a primer layer with good adhesion and wear resistance; Step 3: Wood grain spraying: Use spraying equipment to spray wood grain ink onto the surface of the primer layer to form a coating with wood grain texture. When spraying, the spraying distance, spraying speed and spraying pressure must be controlled to ensure the natural and realistic wood grain effect. Step 4: Wood grain effect processing: Before the wood grain paint dries, use a special wood grain tool to drag the desired wood grain effect on the paint surface, and adjust the direction and thickness of the wood grain as needed; Step 5: Electrophoretic coating: Immerse the aluminum profile with wood grain sprayed in the electrophoretic tank, use a DC power supply to apply voltage between the aluminum profile and the electrophoretic paint, so that the electrophoretic paint forms a uniform and tight electrophoretic coating on the surface of the aluminum profile; Step 6: Drying and curing: Place the aluminum profile after electrophoretic coating into a drying furnace. After drying, the coating forms a protective layer with moderate hardness and good wear resistance.

2. The wood grain electrophoretic spraying process for aluminum profiles according to claim 1, characterized in that: The sanding treatment in step 1 is performed using 700-1000 mesh sandpaper or grinding wheel to remove oil stains, oxide layers and impurities on the surface of the aluminum profile and improve the adhesion of the coating.

3. The wood grain electrophoretic spraying process for aluminum profiles according to claim 1, characterized in that: The thickness of the primer layer in step 2 is controlled at 20-30 microns. The primer layer is evenly sprayed on the surface of the aluminum profile using epoxy primer or acrylic primer to enhance the adhesion, durability and corrosion resistance of subsequent coatings.

4. The wood grain electrophoretic spraying process for aluminum profiles according to claim 1, characterized in that: In the step 3, the distance during spraying is controlled at 15-25 cm, and the speed of spraying is controlled at 1-2 square meters per minute.

5. The wood grain electrophoretic spraying process for aluminum profiles according to claim 1, characterized in that: The wood grain tool in step 4 is one or more of a wood grain brush, a sponge brush, a sponge bar, and a steel scraper.

6. The wood grain electrophoretic spraying process for aluminum profiles according to claim 1, characterized in that: The voltage in step five is controlled at 50V-400V, the thickness of the electrophoretic coating is controlled at 15-25 microns, and the current is controlled between 1A-10A.

7. The wood grain electrophoretic spraying process for aluminum profiles according to claim 1, characterized in that: The drying furnace in step six adopts a hot air circulation drying method, the drying temperature is controlled at 160-180° C., and the drying time is 30-40 minutes.

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