Pre-embedded soft magnetic material surface treatment structure and treatment process suitable for wood base material

Abstract

The invention discloses a pre-embedded soft magnetic material surface treatment structure and treatment process suitable for a wood base material, and the pre-embedded soft magnetic material surface treatment structure comprises a base material which is a medium-density fiberboard; the soft magnetic material or the iron adhesive tape is attached to the surface of the base material to form a magnetic attraction functional layer; the soft magnetic material or the iron adhesive tape is divided into a plurality of independent small blocks, and gaps are formed between the small blocks so as to disperse stress caused by temperature change; the surface of the base material is further provided with at least one layer of primer and finish paint, the primer is oily primer or water-based primer, the finish paint is water-based finish paint, and the finish paint evenly covers the soft magnetic material or the iron rubberized fabric. The magnetic material is segmented into a plurality of small blocks, and tiny gaps are reserved among the small blocks, so that the stress caused by temperature change can be effectively dispersed, the phenomenon of paint film cracking is avoided, and particularly, good durability is realized in the application of water-based finish paint; the stability and the service life of the product in different temperature environments can be obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of furniture manufacturing and surface treatment, and in particular to a surface treatment structure and a treatment process of a pre-embedded soft magnetic material suitable for a wooden substrate. Background Art

[0002] Soft magnetic materials or iron tape materials have good flexibility and the ability to absorb magnets or soft magnets. They have become important materials in the design and production of household and commercial furniture such as children's furniture, wall decorations, custom furniture, and commercial displays. However, due to the physical properties of natural thermal expansion and contraction of soft magnetic materials and iron tape materials, they can often only be pasted or covered on the surface of the product. Soft magnets are usually fixed directly to the surface of an object through adhesives or other fixing methods. The soft magnetic material is visible and can be used directly. However, the problem with this treatment method is that the soft magnetic material or iron tape material is exposed and easily damaged; and it lacks aesthetics due to the lack of surface treatment.

[0003] Paint treatment is a process used to protect and beautify the surface of a product. It usually includes steps such as surface cleaning, sanding, primer, intermediate coating, topcoat, and drying and curing. First, impurities and defects on the surface are removed by sanding and cleaning to ensure uniform adhesion of the paint. Primer coating is to improve the adhesion of the topcoat and close the pores of the material. Depending on the needs, some processes will add an intermediate coating to enhance the thickness and durability of the paint film. The topcoat is responsible for providing the final color, gloss and protection, and is applied by spraying or brushing. Commonly used materials include water-based paint, oil-based paint, and special effect paints such as matte, glossy or metallic paint. Drying and curing are key steps to ensure that the coating is strong and durable. The final effect can give the product a colorful, smooth and uniform appearance, while improving its wear resistance, corrosion resistance and service life. Through fine paint treatment, not only can the appearance of the product be improved, but also its functionality and durability can be increased.

[0004] The main disadvantage of oil-based paint is that it is less environmentally friendly and contains a high level of volatile organic compounds (VOCs). During use, it releases gases that are harmful to the environment and human body and has a strong odor. In particular, it is not suitable for use in confined spaces during construction and drying. In addition, oil-based paint takes a long time to dry and requires a long time to cure after construction. Organic solvents are also required when cleaning tools, which increases the difficulty and cost of cleaning. In contrast, the advantage of water-based paint is that it is safe and environmentally friendly. It uses water as a solvent and has a low VOC content, which reduces harm to the environment and health. It has a lighter odor and is suitable for indoor use. Water-based paint is also the main paint material used for household furniture, especially children's furniture.

[0005] However, temperature changes can cause the expansion and contraction of soft magnetic or iron tape materials. Since the paint film of water-based paint is relatively fragile, when the soft magnetic or iron tape material expands or contracts due to temperature changes, the paint film may not be able to synchronously follow these changes, thus being subjected to greater stress. This stress is concentrated on the surface of the paint film, which can easily cause it to tear or crack. Especially in outdoor environments, where the temperature difference between day and night is large, the frequent alternation of thermal expansion and contraction of the paint film makes it easier for cracks to form on the surface of the water-based paint. Therefore, when using water-based paint, the impact of temperature changes on soft magnetic or iron tape materials must be considered to reduce the risk of paint film cracking.

[0006] At present, there is a process for spraying paint on the surface of soft magnetic materials or iron tape materials, but the main surface treatment used is oil-based paint, and this process will not be used on children's furniture or children's play furniture. It is mainly used on commercial furniture. Using oil-based paint as a surface coating is not a difficult task on soft magnetic materials or iron tape materials, and it is also a relatively common treatment method. However, there is no patent for spraying water-based paint on soft magnetic materials. There is currently no precedent for this method in the treatment of children's furniture. At present, the application of soft magnetic materials or iron tape materials in children's furniture is mainly concentrated on some toy drawing boards. This product is a mounted soft magnetic product, and the soft magnet is attached to the wooden frame or wooden board behind it, that is, the soft magnet or iron tape is exposed.

[0007] At present, the process of spraying oil-based paint on the surface of soft magnetic materials or iron tape (mainly oil-based paint) is only used in the field of commercial furniture. This is because although the chemical additives contained in the oil-based paint will release a certain degree of toxicity, these chemical additives can significantly increase the hardness of the paint surface. Therefore, even if the soft magnetic material or iron tape changes due to thermal expansion and contraction, the oil-based paint will not easily crack. Based on this, the spraying process of oil-based paint on soft magnetic materials or iron tape is not complicated and has become a common treatment method.

[0008] However, the use of oil-based paint is not common in children's furniture or children's play furniture, mainly because its chemical composition may have adverse effects on children's health. At the same time, there is no specific patent for the process of spraying water-based paint on the surface of soft magnetic materials at this stage, especially in the field of children's furniture, where such treatment methods are still blank. At present, the application of soft magnetic materials or iron tape in children's furniture or children's play furniture is mostly concentrated in products such as toy drawing boards. Such products usually mount soft magnetic materials on wooden frames or wooden boards, that is, the soft magnetic materials or iron tape are exposed to the outside and lack further surface treatment. Therefore, there is still room for improvement in terms of environmental protection, interactivity, DIY characteristics, fun, and child safety.

[0009] In the prior art, soft magnetic materials or iron tape are usually directly exposed on the external surface, lacking effective protection. This design easily causes the soft magnetic materials or iron tape to be damaged by physical friction or scratches, greatly affecting the durability of the product. In addition, since the material is exposed to the outside, the prior art cannot provide high aesthetics, especially in children's furniture and game furniture that have high requirements for appearance, and cannot meet consumers' expectations for visual effects.

[0010] In addition, although oil-based paint is commonly used on the surface of soft magnetic materials or iron tape, the volatile organic compounds (VOCs) it contains will release harmful gases during use, especially in children's furniture, which may have adverse effects on children's health. At the same time, oil-based paint has a strong odor during construction and is not suitable for use in a closed environment, which limits its application in home furniture. In contrast, although water-based paint has the advantages of environmental protection and safety, in the prior art, there is no patent for the process of applying water-based paint to the surface of soft magnetic materials or iron tape. Since soft magnetic materials and iron tape have obvious thermal expansion and contraction characteristics, when the temperature changes greatly, water-based paint spraying is prone to cracking at the joints, edges, R corners, etc. of the product due to the brittleness of the paint film. This phenomenon is particularly obvious in an environment with a large temperature difference, and may even cause cracking problems in other surface areas, further limiting the wide application of water-based paint with soft magnetic or iron tape materials in actual production.

[0011] Therefore, the prior art faces a series of problems in the use of soft magnetic materials and iron adhesive tape, including fragility, lack of aesthetics, health risks of oil-based paints, and a lack of water-based paint application technology. The present invention aims to solve these problems and provide a safer, more environmentally friendly and beautiful surface treatment process for soft magnetic materials and iron adhesive tape, which is particularly suitable for the design and production of children's furniture and game furniture. Summary of the invention

[0012] In order to solve the above problems, the present invention provides a surface and structure treatment process for embedded soft magnetic materials suitable for wood or other substrates, which solves the problems of soft magnetic materials or iron adhesive tape being easily damaged and lacking in aesthetics when exposed to the outside, and the health risks of existing oil-based paint treatment methods in children's furniture. It also aims to solve the technical gap in the spraying process of water-based paint on the surface of soft magnetic materials or iron adhesive tape, and provides a surface treatment method that is both environmentally friendly and safe, which is suitable for the use environment of children's furniture and game furniture, and meets the needs of modern consumers for environmental protection and safety.

[0013] The present invention is realized by the following technical scheme: a pre-embedded soft magnetic material surface treatment structure suitable for a wood substrate, comprising:

[0014] A substrate, wherein the substrate is a medium density fiberboard;

[0015] A soft magnetic material or iron adhesive tape is attached to the surface of the substrate to form a magnetic absorption functional layer;

[0016] The soft magnetic material or iron adhesive tape is divided into a plurality of independent small blocks, each of which has a gap between them to disperse the stress caused by temperature change;

[0017] The substrate surface is also provided with at least one layer of primer and topcoat, the primer is an oily primer or a water-based primer, the topcoat is a water-based topcoat, and the topcoat is evenly covered on the soft magnetic material or iron adhesive tape to improve the appearance and protective performance.

[0018] As a preferred technical solution, the thickness of the wooden substrate is 15 mm.

[0019] As a preferred technical solution, the thickness of the soft magnetic material or iron adhesive tape is 1 mm.

[0020] As a preferred technical solution, the gap between the small pieces of soft magnetic material or iron adhesive tape is 0.5 mm to less than 1 mm.

[0021] As a preferred technical solution, the soft magnetic material or iron tape located at the edge of the substrate is cut into small pieces of 20 mm×50 mm or special-shaped small pieces within 20 mm×50 mm.

[0022] As a preferred technical solution, the soft magnetic material or iron tape located in the inner area of ​​the substrate is cut into small pieces of 50 mm×50 mm or special-shaped small pieces within 50 mm×50 mm.

[0023] As a preferred technical solution, a wooden frame pressing structure is also provided on the surface of the substrate to enhance the strength of the overall structure or provide a decorative function.

[0024] The present invention provides a surface water-based paint treatment process for pre-embedded soft magnetic materials or iron adhesive tape in wooden furniture, comprising the following steps:

[0025] a) Substrate preparation: Cut the medium density fiberboard into substrates according to product size;

[0026] b) Soft magnetic material or iron tape bonding: Paste the soft magnetic material or iron tape that matches the size of the substrate on the surface of the substrate, and firmly adhere the soft magnetic material or iron tape to the surface of the substrate by adhesion;

[0027] c) Segmented cutting process: The attached soft magnetic material or iron tape is segmented and cut into several small pieces, with gaps between each small piece;

[0028] d) Primer spraying: spray a layer of oily primer on the substrate and the soft magnetic material or iron tape on it to improve the adhesion and durability of the paint film;

[0029] e) Topcoat coverage: After the primer is dry, spray a layer of water-based topcoat to cover the entire surface to ensure the environmental performance of the soft magnetic material or iron tape and the beauty and integrity of the paint surface.

[0030] As a preferred technical solution, the substrate after the primer is sprayed is placed in a closed environment at 25° C. to 30° C. to dry, so as to ensure the uniformity and adhesion of the primer.

[0031] As a preferred technical solution, the substrate covered with the water-based topcoat is initially dried for 30 minutes and then placed at room temperature to continue drying to increase the durability of the paint film.

[0032] The beneficial effects of the present invention are as follows: by cutting the soft magnetic or iron adhesive tape material into several small pieces and leaving a small gap between the small pieces, the stress caused by temperature changes can be effectively dispersed, and the cracking of the paint film can be avoided, especially in the application of water-based topcoat, achieving good durability. This design can significantly improve the stability and service life of the product under different temperature environments;

[0033] The surface treatment after the soft magnetic or iron tape material is divided is sprayed with multiple layers of primer and topcoat, which not only covers the magnetic material itself, but also provides a uniform and smooth appearance, improving the overall aesthetics. At the same time, the environmentally friendly characteristics of water-based topcoat make this design suitable for children's furniture and family interior use, meeting the dual needs of modern home design for beauty and safety;

[0034] The present invention can use a combination of PU oily primer and watery topcoat, or a combination of watery primer and watery topcoat, which not only utilizes the high adhesion of oily paint, but also takes advantage of the low VOC emission and low odor characteristics of watery paint, and is suitable for children's furniture and household products with high environmental protection requirements and involving magnetic suction functions, thereby reducing health risks to children and family members;

[0035] The closed drying and segmented block design process adopted by the present invention is suitable for implementation in different furniture manufacturing scenarios, and is particularly suitable for children's furniture with magnetic suction functions, toy storage, wall decoration and other interactive design home products. It expands the application scope of magnetic materials in the fields of home and commercial display, and provides an environmentally friendly and efficient surface treatment solution for furniture manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic diagram of the explosion structure of the present invention;

[0038] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 3 It is a structural schematic diagram of embodiment 1 of the present invention;

[0040] Figure 4 and Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0041] Figure 6 and Figure 7 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0042] Figure 8 and Fig. 9 This is a schematic diagram of the structure of Example 4 of the present invention. DETAILED DESCRIPTION

[0043] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0044] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0045] like Figure 1 As shown, a pre-embedded soft magnetic material surface treatment structure suitable for a wooden substrate of the present invention, first, a medium density fiberboard (MDF) is used as a substrate 1, and its thickness is 15 mm. The substrate 1 has good dimensional stability and mechanical properties, and is suitable for the production of various types of furniture. At the same time, its surface is flat and smooth, and can better adhere to soft magnetic materials or iron tape. After the substrate is prepared, a soft magnetic material or iron tape 2 with a thickness of 1 mm is adhered to the surface of the substrate to form a layer with a magnetic attraction function. This magnetic attraction functional layer can provide a convenient magnetic adsorption effect, and is suitable for the fields of children's furniture, toy storage, wall decoration, etc. In order to ensure the adhesion effect, a high-viscosity double-sided tape or other suitable adhesive is usually used to firmly adhere the soft magnetic material or iron tape to the surface of the substrate to ensure its long-term stability.

[0046] In order to reduce the problem of thermal expansion and contraction of materials caused by temperature changes and avoid cracking of the paint film due to stress concentration, the soft magnetic material or iron tape pasted on the surface of the substrate is segmented and cut into pieces. Specifically, the soft magnetic material or iron tape is divided into several independent small pieces to effectively disperse the stress caused by temperature changes. During the segmentation process, a gap of 0.5 mm to 1 mm is reserved between the small pieces of soft magnetic material or iron tape. Through this design structure, when the material expands due to heat or contracts due to cooling, the stress is released and the pulling effect on the coating is reduced. The choice of segmentation method also needs to consider the cutting position and size of the soft magnetic material or iron tape. The soft magnetic material or iron tape located at the edge of the substrate is cut into small pieces of 20 mm × 50 mm ( Figure 2 ), while the soft magnetic material or iron tape in the inner area of ​​the substrate is cut into small pieces of 50 mm × 50 mm. This design not only meets the magnetic attraction function, but also effectively avoids the cracking of the paint film caused by stress concentration in the edge area and the inner area.

[0047] After the segmentation and block processing of the magnetic material is completed, the surface coating process begins. First, a layer of primer is sprayed on the surface of the substrate. The primer is PU oily primer, which has strong adhesion and hardness, and can provide a good foundation for the subsequent water-based topcoat. After the primer is applied, it needs to be dried in a closed environment so that it can be fully cured and attached to the surface of the substrate, providing a preliminary protective layer for the soft magnetic material or iron tape. After the primer is fully dried, the water-based topcoat is evenly sprayed on its surface. In the closed paint product, the oily primer can only be used in the closed paint product, because the closed topcoat on the surface will block the VOC volatilization of the oily primer. If the product is an open paint surface, the primer must also use a water-based primer to ensure that it meets the test requirements. The topcoat is evenly covered on the surface of the substrate and the magnetic material, so that the entire surface presents a smooth and uniform appearance, improves the overall aesthetics, and forms an effective protective coating for the magnetic material.

[0048] In addition, a wooden frame pressing structure is preferably provided on the surface of the substrate to enhance the strength of the overall structure, prevent the magnetic material from being deformed due to external impact or bending, and provide additional decorative functions. With the help of the wooden frame pressing structure, the overall structure exhibits higher stability and durability during use.

[0049] Example 1

[0050] like Figure 2 and Figure 3 As shown, the substrate is prepared for soft magnetic bonding

[0051] First, you need to prepare a medium density fiberboard (MDF) with a thickness of 15mm (see Figure 3). Next, a layer of soft magnetic material or iron tape with a thickness of 1 mm that matches the size of the substrate exactly needs to be pasted on the surface of the cut substrate (see Figure 3 , 1mm soft magnetic). During the lamination process, double-sided tape is used to firmly adhere the soft magnetic material or iron tape to the medium-density fiberboard to ensure the flatness and firmness of the material. This process lays the foundation for the subsequent cutting and coating processes.

[0052] Core technology: cutting and block processing

[0053] The core technology of this invention is to optimize the cutting process of soft magnetic or iron tape. Initially, we tried to cut the soft magnetic material into blocks of size 80mm×80mm (see Figure 1 , 80*80mm grid), but the test results show that such a size is still large, especially at the edge, there is still a large thermal expansion and contraction stress, which fails to effectively solve the problem caused by thermal expansion and contraction at the edge of the material. The thermal expansion and contraction effect causes the coating of water-based paint to crack at the edge of the material (see Figure 1 ), thus affecting the appearance and function of the product.

[0054] To address this problem, the present invention further improves the cutting process and adopts a segmented block design. Specifically, at the edge of the substrate, the soft magnetic material is cut into small pieces of 20 mm × 50 mm, while in the inner area, the cutting size of the soft magnetic material is adjusted to 50 mm × 50 mm (see Figure 3 , grid). The key to this optimization solution is to reduce the expansion and contraction stress caused by temperature changes by reducing the size of the soft magnetic material. This segmented block method can effectively disperse the stress concentration caused by thermal expansion and contraction, thereby avoiding the problem of cracking of the coating at the edge. In addition, this process not only ensures the maintenance of magnetic attraction, but also reduces the risk of edge cracks, so that the entire product is improved in both function and aesthetics.

[0055] This improvement scheme fully reflects the core principle of optimizing the influence of thermal expansion and contraction on the coating by rationally designing the material segmentation method, and is one of the main innovations of the present invention.

[0056] Cutting and slicing process and primer treatment

[0057] When cutting soft magnetic or iron tape materials, we use a blade scoring process. This process only cuts off the soft magnetic or iron tape material without taking away any material, so there will be no obvious gap after cutting. After cutting, there is no need to use putty to fill the gap. This precise cutting method ensures that the material maintains integrity and tightness while being divided.

[0058] After cutting, the substrate surface will be primed. Due to the thermal expansion and contraction characteristics of soft magnetic or iron tape materials, extremely fine cracks may appear on the primer surface (see Figure 2 ). These fine cracks are not only normal, but also help to alleviate the stress distribution caused by thermal expansion and contraction. Compared with a whole piece of soft magnetic material, the small pieces of soft magnetic material after segmentation can better adapt to temperature changes and reduce the risk of cracking caused by uneven force on a large area of ​​material. In order to ensure the integrity and aesthetics of the product surface, the final step is to use a water-based topcoat for surface spraying. The water-based topcoat can provide better environmental performance while covering the fine cracks on the primer, making the entire surface smooth and beautiful and extending the service life of the product. This treatment method not only improves the visual effect of the product, but also ensures the long-term stability and durability of the material in actual use.

[0059] Environmentally friendly coating

[0060] This process uses closed paint treatment technology, combining the advantages of PU oily primer and water-based topcoat. Although water-based primer can be selected during the process, we prefer PU oily primer because it has higher hardness and durability, and in this type of closed topcoat process, the chemical volatiles in the oily paint will not penetrate the water-based topcoat and be released into the air, thus avoiding environmental pollution. This double-layer coating system ensures the mechanical strength of the product while meeting environmental protection requirements, and is very suitable for children's furniture and other household products.

[0061] In the field of children's furniture, the use of water-based topcoat is a widespread safety requirement because it has low volatile organic compounds (VOC) and reduces health risks for children. Therefore, water-based topcoat is an essential option for such products. However, since the paint film of water-based topcoat is relatively brittle and easily cracks during thermal expansion and contraction, the process of pre-embedding soft magnetic materials under the paint becomes the key to solving this problem. The present invention effectively disperses the stress of the soft magnetic material through block design and special process treatment, ensuring that the water-based topcoat will not crack during long-term use, thereby extending the service life of the product and maintaining its aesthetics. This treatment method provides an indispensable solution for children's furniture and other products with high safety and environmental protection requirements.

[0062] Example 2

[0063] Substrate preparation and soft magnetic bonding

[0064] The preparation of the substrate and the soft magnetic material is the same as in Example 1. First, a medium density fiberboard (MDF) needs to be cut according to the specific size requirements of the product. The thickness after cutting should be 15 mm (see Figure 5). Next, a layer of soft magnetic material or iron tape with a thickness of 1 mm that matches the size of the substrate exactly needs to be pasted on the surface of the cut substrate (see Figure 5 , 1mm soft magnetic). During the lamination process, double-sided tape is used to firmly adhere the soft magnetic material or iron tape to the medium-density fiberboard to ensure the flatness and firmness of the material. This process lays the foundation for the subsequent cutting and coating processes.

[0065] Core technology: cutting and block processing

[0066] The core technology of the present invention lies in the precise control of the cutting process of the soft magnetic material or iron tape. In this embodiment, since the product design requires a circle of curved wood board to be pressed on the substrate to form an inner cavity structure, the process is different from that of Example 1. The wooden frame is connected to the substrate wood board, and an R angle 5 is formed at the interface (see Figure 4 ), before making a standard 50mm×50mm cut, you must first cut a surface groove corresponding to the wooden frame on the soft magnetic or iron tape material according to the shape of the wooden frame.

[0067] In order to ensure the accurate positioning of the wooden frame, a wooden pin 7 is used to fix it in the cut surface groove, and the curved wooden board is tightly connected to the main plate of the substrate by pressing (see Figure 5 ). Since the curved wooden board is directly connected to the main flat board, it is necessary to carve a surface groove corresponding to the wooden frame in this area before pressing the wooden frame to remove the soft magnetic material to prevent the soft magnetic material or iron tape from being squeezed in the subsequent process. This is the main difference between this embodiment and embodiment 1, especially when other materials are applied or installed on the MDF substrate, the soft magnetic or iron tape material needs to be processed by surface groove cutting.

[0068] In addition, the R angle formed at the connection between the soft magnetic material or iron tape material and the curved wood board should retain a 0.5-1mm expansion space to accommodate thermal expansion and contraction and prevent the material from being damaged due to stress concentration. Next, the soft magnetic material is cut into small pieces of 20mm×50mm or special-shaped small pieces within 20mm×50mm near the edge of the substrate, while the soft magnetic material inside maintains a standard size of 50mm×50mm or special-shaped small pieces within 50mm×50mm (see Figure 5 This cutting method can effectively disperse the stress caused by thermal expansion and contraction, avoid coating cracking, and maintain the stability of magnetic attraction.

[0069] This innovative design reduces the size of the soft magnetic material, reduces its tensile stress and avoids edge cracks. The core principle of this process is to rationally divide the material to optimize stress distribution, thereby improving the durability and functionality of the overall structure.

[0070] Cutting and slicing process and primer treatment

[0071] In this embodiment, since it is necessary to press the curved wooden board on the MDF substrate, it is first necessary to cut the surface groove 8 of the soft magnetic or iron tape material that has been bonded to the surface. This process is different from the blade scribing process. The surface groove cutting uses a knife to cut and take away a part of the soft magnetic or iron tape material that needs to be removed to provide space for pressing the curved wooden board. Through this cutting process, the soft magnetic or iron tape material can be cut into a surface groove 8 that conforms to the shape of the curved wooden board on the MDF substrate. After the surface groove cutting is completed, the curved template is fixed with a wooden pin, and the curved wooden board is pressed into the cut surface groove layer by layer with glue, and finally fixed by a cold press to complete the pressing step of the curved wooden board.

[0072] After the curved wood board is pressed, the second step is to use the same blade scribing process as in Example 1 to perform standard block cutting on the remaining soft magnetic or iron tape material on the substrate. Cutting is performed according to the size of 20*50mm at the edge and 50*50mm inside. This process does not take away the material, so no obvious gaps are formed. Due to the accuracy of this cutting process, there is no need to use putty to fill the gaps after cutting.

[0073] After cutting, the substrate surface is then primed. Over time, the soft magnetic or iron tape material may shrink slightly due to thermal expansion and contraction, resulting in fine cracks on the primer surface (see Figure 6 ). This is normal and helps relieve stress buildup in the material. To ensure the integrity and aesthetics of the product surface, a water-based topcoat is applied to further protect the surface and enhance its appearance.

[0074] Environmentally friendly coating

[0075] This process uses closed paint treatment technology, combining the advantages of PU oily primer and water-based topcoat. Although water-based primer can be selected during the process, we prefer PU oily primer because it has higher hardness and durability, and in this type of closed topcoat process, the chemical volatiles in the oily paint will not penetrate the water-based topcoat and be released into the air, thus avoiding environmental pollution. This double-layer coating system ensures the mechanical strength of the product while meeting environmental protection requirements, and is very suitable for children's furniture and other household products.

[0076] In the field of children's furniture, the use of water-based topcoat is a widespread safety requirement because it has low volatile organic compounds (VOC) and reduces health risks for children. Therefore, water-based topcoat is an essential option for such products. However, since the paint film of water-based topcoat is relatively brittle and easily cracks during thermal expansion and contraction, the process of pre-embedding soft magnetic materials under the paint becomes the key to solving this problem. The present invention effectively disperses the stress of the soft magnetic material through block design and special process treatment, ensuring that the water-based topcoat will not crack during long-term use, thereby extending the service life of the product and maintaining its aesthetics. This treatment method provides an indispensable solution for children's furniture and other products with high safety and environmental protection requirements.

[0077] Example 3

[0078] like Figure 6 and Figure 7 As shown, in this embodiment, the steps are exactly the same as those in Embodiment 2, the only difference being that the size of the pressed curved wooden frame 6 has changed. Specifically, the size of the curved wooden frame is adjusted in this embodiment according to the design requirements, but the overall process flow, including the steps of substrate preparation, soft magnetic lamination, surface groove cutting, blade scribing and other core process technologies, remains unchanged. The surface groove cutting is still used to reserve space for the pressing of the curved wooden board, and then the pressing is performed according to the adjusted size of the curved wooden frame, and the accurate positioning and fixation of the wooden frame is ensured.

[0079] After the curved wooden frame is pressed, the soft magnetic or iron tape material is cut according to the same blade scribing process. The cutting size and steps are consistent with Example 2 to ensure that the cut material has good expansion and contraction properties and avoid stress concentration problems caused by thermal expansion and contraction.

[0080] Example 4

[0081] The steps of this embodiment are basically the same as those of the embodiment 3, the only difference being the size of the substrate and the shape of the pressed curved wooden frame. In this embodiment, the size of the substrate is adjusted according to the product design requirements, possibly to accommodate different application scenarios or functional requirements. At the same time, the shape of the pressed curved wooden frame is also different from the previous embodiment, possibly involving a more complex curved structure or special design details.

[0082] Although the substrate size and curved wooden frame shape are different, the overall process remains the same, including surface groove cutting, wooden frame fixing, cold press pressing, blade scoring and block processing, and subsequent primer spraying and water-based topcoat covering. This consistency ensures the reliability of the product in terms of function and performance, while being flexible to adjust according to specific design needs to adapt to different structural and appearance requirements.

[0083] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A pre-embedded soft magnetic material surface treatment structure suitable for a wood substrate, characterized in that: include: A substrate, wherein the substrate is a medium density fiberboard; A soft magnetic material or iron adhesive tape is attached to the surface of the substrate to form a magnetic absorption functional layer; The soft magnetic material or iron adhesive tape is divided into a plurality of independent small blocks, each of which has a gap between them to disperse the stress caused by temperature change; The surface of the substrate is also provided with at least one layer of primer and topcoat, the primer is an oily primer or a water-based topcoat, and the topcoat is a water-based topcoat, and the topcoat is evenly covered on the soft magnetic material or iron adhesive tape to improve the appearance and protective performance.

2. The surface treatment structure of the pre-embedded soft magnetic material suitable for a wooden substrate according to claim 1, characterized in that: The thickness of the wooden substrate is 15 mm.

3. The surface treatment structure of the pre-embedded soft magnetic material suitable for a wooden substrate according to claim 1, characterized in that: The thickness of the soft magnetic material or iron adhesive tape is 1 mm.

4. The surface treatment structure of the pre-embedded soft magnetic material suitable for a wooden substrate according to claim 1, characterized in that: The gaps between the small pieces of soft magnetic material or iron adhesive tape are 0.5 mm to less than 1 mm.

5. The surface treatment structure of the pre-embedded soft magnetic material suitable for a wooden substrate according to claim 1, characterized in that: The soft magnetic material or iron tape located at the edge of the substrate is cut into small pieces of 20 mm×50 mm or special-shaped small pieces within 20 mm×50 mm.

6. The surface treatment structure of the pre-embedded soft magnetic material suitable for a wooden substrate according to claim 1, characterized in that: The soft magnetic material or iron tape located in the inner area of ​​the substrate is cut into small pieces of 50 mm×50 mm or special-shaped small pieces within 50 mm×50 mm.

7. The surface treatment structure of the pre-embedded soft magnetic material suitable for a wooden substrate according to claim 1, characterized in that: A wooden frame pressing structure is also provided on the surface of the substrate to enhance the strength of the overall structure or provide a decorative function.

8. A process for treating the surface of wooden furniture with water-based paint for pre-embedded soft magnetic materials or iron adhesive tape, characterized in that: The following steps are involved: a) Substrate preparation: Cut medium density fiberboard or other materials into substrates according to product size; b) Soft magnetic material or iron tape bonding: Paste the soft magnetic material or iron tape that matches the size of the substrate on the surface of the substrate, and firmly adhere the soft magnetic material or iron tape to the surface of the substrate by adhesion; c) Segmented cutting: The attached soft magnetic material or iron tape is segmented and cut into several small pieces, with gaps between each small piece; d) Primer spraying: spray a layer of oily primer on the substrate and the soft magnetic material or iron tape on it to improve the adhesion and durability of the paint film; e) Topcoat coverage: After the primer is dry, spray a layer of water-based topcoat to cover the entire surface to ensure the environmental performance of the soft magnetic material or iron tape and the beauty and integrity of the paint surface.

9. The surface treatment structure of the pre-embedded soft magnetic material suitable for a wooden substrate according to claim 8, characterized in that: The substrate after primer spraying is placed in a closed environment at 25℃ to 30℃ to dry to ensure the uniformity and adhesion of the primer.

10. The surface treatment structure of the pre-embedded soft magnetic material suitable for a wooden substrate according to claim 8, characterized in that: After the substrate is covered with water-based topcoat, it is initially dried for 30 minutes and then left to continue drying at room temperature to increase the durability of the paint film.

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