A process for making a bamboo charcoal plate relief

Abstract

This invention discloses a process for making bamboo charcoal relief sculptures, belonging to the field of sheet material processing technology. The process includes the following steps: Step 1, raw material forming and pretreatment of the sheet surface; Step 2, CNC three-dimensional relief carving and tank cleaning; Step 3, overall sealing and base coating and layered coloring of the relief; Step 4, low-temperature ceramic glaze preparation and glazing treatment of the relief; Step 5, segmented low-temperature glaze curing and finished product protection. The beneficial effects of this invention are: it improves upon the problems of rough carving, blurred relief outlines, and insufficient detail in traditional processes; it also avoids edge chipping and chipping of the sheet material, and prevents dust accumulation that could cause uneven coloring and glazing thickness, thus improving the overall processing quality of the relief. It can eliminate defects such as glaze bubbles, runs, and localized glaze accumulation, allowing the glaze layer to completely and evenly coat the relief surface.

Description

Technical Field

[0001] This invention relates to the field of sheet metal processing technology, specifically a process for creating relief sculptures on bamboo charcoal sheets. Background Technology

[0002] Bamboo charcoal is a porous carbonaceous material made from bamboo, such as moso bamboo, through a high-temperature, oxygen-free carbonization process. It has a dense honeycomb-like microporous structure inside, which has a strong adsorption capacity. It can adsorb formaldehyde, odors, and moisture in the air, while releasing far-infrared rays and regulating the temperature and humidity of the space. Bamboo charcoal is stable, non-toxic, non-irritating, environmentally friendly, and safe. It is often processed into bamboo charcoal powder, charcoal granules, or co-extruded with resin to make bamboo charcoal boards, which are widely used in interior decoration, home purification, moisture-proofing, and deodorization.

[0003] Bamboo charcoal relief panels are environmentally friendly decorative panels made from bamboo charcoal boards co-extruded with high-temperature carbonized bamboo charcoal powder and polymer substrates. Through hot-pressing relief molds or three-dimensional laser embossing technology, wood grain, water ripple, landscape and other three-dimensional textures are pressed onto the surface of the panels. They are widely used in home decoration background walls, commercial showrooms, special tea tables, and whole-house custom cabinets, combining three-dimensional decorative effects with practical functions such as air purification, durability and easy maintenance.

[0004] However, the traditional carving process in the existing technology is rough, does not distinguish between rough milling and fine milling, the relief outline is blurry, the detail is poor, and the edges of the carved board are prone to chipping and chipping. Dust and materials are easy to accumulate in the groove, resulting in uneven thickness of subsequent coloring and glazing.

[0005] Therefore, we propose a bamboo charcoal board relief carving process. Summary of the Invention

[0006] In view of the problems existing in the above and / or existing bamboo charcoal board relief production process, the present invention is proposed.

[0007] Therefore, the purpose of this invention is to provide a bamboo charcoal board relief carving process. By improving the existing bamboo charcoal board relief carving process, it can solve the problems mentioned above, such as the roughness of the traditional carving process, the lack of distinction between rough milling and fine milling, the blurry relief outline, poor detail expression, and the easy occurrence of chipping and chipping at the edges of the board after carving. Furthermore, dust and materials easily accumulate in the groove, causing uneven thickness of subsequent coloring and glazing.

[0008] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0009] A process for creating relief carvings on bamboo charcoal boards, comprising the following steps:

[0010] Step 1: Raw material forming and board surface pretreatment, processing bamboo scraps into flat bamboo charcoal substrates;

[0011] Step 2: CNC 3D relief carving and groove cleaning. The preset relief pattern program is retrieved, and a CNC carving machine is used in two processes: rough milling of the outline and fine milling of the details. A 3D relief groove is milled on the front of the bamboo charcoal substrate. The milling depth varies depending on the relief type: 2mm for shallow relief, 3mm for medium relief, and 5mm for deep relief. The edges of the relief outline are rounded with a 0.4mm radius. After carving, any remaining bamboo charcoal powder in the relief groove is blown away. A 0.3mm flat support surface is left at the bottom of the groove to prevent material accumulation.

[0012] Step 3: Overall sealing and basting, layering and coloring of the relief. Mix water-based sealing primer containing water-based acrylic resin, talc powder and defoamer, and apply it in two coats to the flat surface of the bamboo charcoal substrate and all the concave and convex inner walls of the relief.

[0013] Step 4: Low-temperature ceramic glaze preparation and relief glazing treatment, including coating with relief glaze;

[0014] Step 5: Segmented low-temperature glaze curing and finished product protection. The glazed slab is sent into a constant temperature oven and baked in two stages with controlled temperature. The total baking time is 80 minutes, which further protects the finished product.

[0015] As a preferred embodiment of the bamboo charcoal board relief production process described in this invention, in step one, the raw material forming and board surface pretreatment involve first vibrating and screening the bamboo scraps to remove impurities such as stones and soil. The screened bamboo scraps are then subjected to high-temperature carbonization and crushing to obtain 300-mesh bamboo charcoal powder. This 300-mesh bamboo charcoal powder is mixed with environmentally friendly water-based cassava starch adhesive as a binder and pressed into a board blank under a pressure of 10 MPa. The board blank is cured and molded at a low temperature of 50℃ to obtain a flat bamboo charcoal substrate. The flat bamboo charcoal substrate is then polished to remove burrs and protrusions from its surface. Further cleaning and polishing remove any remaining dust and impurities from the surface of the flat bamboo charcoal substrate. In step three, each coat of paint is applied to the flat surface and relief of the bamboo charcoal substrate and air-dried at room temperature for 30 minutes to seal the capillary pores of the board and prevent subsequent paint seepage and color absorption. After the primer dries completely, water-based mineral pigments are mixed and applied in three thin layers to the relief area. After each layer dries, the pigment depth is adjusted according to the relief's concavity and convexity to enhance the visual effect of the three-dimensional texture.

[0016] In step four, the preparation of low-temperature ceramic glaze and the glazing treatment of relief carving involve mixing raw materials according to the following weight ratio: 70 parts low-temperature ceramic glaze base, 10 parts inorganic mineral pigment, 2 parts suspending agent, and 20 parts deionized water. The mixture is thoroughly stirred and ground until the glaze fineness reaches 400 mesh. After standing, there is no stratification or sedimentation. The glaze is then applied to completely cover all the concave and convex structures of the relief carving, with a glaze thickness controlled at 0.3 mm. After glazing, the material is allowed to stand at room temperature for 15 minutes to allow it to level naturally, eliminating defects such as dripping and glaze accumulation. In step five, the two-stage temperature-controlled baking process involves a pre-baking stage at 80℃ to remove moisture from the gaps between the board and the relief carving. The second stage involves low-temperature sintering at 150℃ to ensure a firm bond between the ceramic glaze and the bamboo charcoal relief surface. The maximum temperature is strictly controlled to prevent board deformation and charcoal powder precipitation. After baking and natural cooling to room temperature, a 0.1 mm thick layer of water-based polyurethane matte wear-resistant varnish is sprayed onto the entire board surface. After air drying at 30℃, the finished product of the three-dimensional relief bamboo charcoal board with ceramic glaze is obtained.

[0017] As a preferred embodiment of the bamboo charcoal board relief production process described in this invention, the rough milling of the outline in step two is mainly used to process the overall shape of the relief, while the fine milling of the details is used to carve the texture and shape of the relief surface. The two processes work together to ensure that the relief shape is complete and the texture is clear.

[0018] As a preferred embodiment of the bamboo charcoal board relief production process described in this invention, in step two, the edges of the relief outline are rounded to avoid chipping or flaking at the edges of the board, and also to make the coating transition of the subsequent coloring and glazing processes smoother.

[0019] As a preferred embodiment of the bamboo charcoal board relief production process described in this invention, in step two, a flat support surface is reserved at the bottom of the relief groove, which can effectively prevent pigments and glazes from accumulating in large quantities at the bottom of the groove and ensure that the coating thickness is uniform throughout the board.

[0020] As a preferred embodiment of the bamboo charcoal board relief production process described in this invention, the water-based sealing primer used in step three can seal the pores inside the bamboo charcoal substrate, prevent the substrate from absorbing a large amount of subsequent pigments and glazes, save production materials while ensuring the coloring and glazing effects.

[0021] As a preferred embodiment of the bamboo charcoal board relief production process described in this invention, in step three, water-based mineral pigments are applied in layers using a thin coating method. Each layer of pigment is completely dried before the next layer is applied, which can effectively prevent pigment from flowing and mixing, and create natural color layers based on the relief's concave and convex structure.

[0022] As a preferred embodiment of the bamboo charcoal board relief production process described in this invention, the low-temperature ceramic glaze prepared in step four has good suspension properties and will not cause layering or sedimentation after long-term storage. This ensures that the glaze composition is uniform during the glazing process. After glazing, the glaze is left to stand for a period of time to allow it to flow naturally, which enables the glaze to evenly cover the relief surface, removes bubbles and marks on the glaze surface, and prevents problems such as dripping and local glaze accumulation.

[0023] As a preferred embodiment of the bamboo charcoal board relief production process described in this invention, in step five, the glazed board is treated with the two-stage temperature-controlled baking method. First, a pre-baking operation is carried out to remove internal moisture, and then low-temperature sintering is carried out to gradually complete the glaze curing, which can effectively protect the bamboo charcoal substrate from high-temperature damage.

[0024] As a preferred embodiment of the bamboo charcoal board relief production process described in this invention, the water-based polyurethane matte wear-resistant varnish sprayed in step five covers the entire surface of the board, which can protect the internal glaze layer and pigment layer, improve the wear resistance and stain resistance of the bamboo charcoal board surface, and extend the service life of the board.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0026] 1. In this invention, by dividing the carving process into two steps—rough milling of the outline and fine milling of the details—and combining this with rounded corners of the relief edges, reserved support surfaces at the bottom of the grooves, and post-carving powder removal, the problems of rough carving, blurred relief outlines, and insufficient detail expression in traditional techniques are improved. At the same time, it avoids edge chipping and chipping of the board, and also prevents dust accumulation from causing uneven coloring and glazing thickness in subsequent processes, thereby improving the overall processing quality of the relief. The proportion and treatment of ceramic glaze are optimized, and after glazing, the surface is allowed to level, which can eliminate defects such as glaze bubbles, runs, and local glaze accumulation, allowing the glaze layer to completely and evenly cover the relief surface.

[0027] 2. In this invention, a segmented temperature-controlled baking mode is adopted. First, the moisture in the board and relief gaps is removed by low-temperature pre-baking. Then, the glaze layer is sintered and cured at low temperature. The temperature is strictly controlled throughout the process, which can not only ensure that the ceramic glaze and bamboo charcoal relief are firmly bonded, but also effectively protect the bamboo charcoal substrate and prevent the board from deforming at high temperature and the precipitation of charcoal powder. Finally, the board is sprayed with water-based polyurethane matte wear-resistant varnish, which forms a comprehensive protection for the internal pigment layer and glaze layer, improves the wear resistance and stain resistance of the finished board, and keeps the relief color and glaze intact for a long time, effectively extending the overall service life of the bamboo charcoal relief board.

[0028] 3. In this invention, by first applying a sealing primer to the entire board, the internal pores of the bamboo charcoal board are sealed, preventing the board from absorbing a large amount of pigment and glaze. This saves raw materials and ensures stable coloring and glazing effects. At the same time, by using a layered thin-coat method of mineral pigments, each layer is allowed to dry completely before continuing construction, preventing pigment from flowing or mixing. The relief structure creates natural color layers, resulting in a better decorative effect. The mixed glaze has good suspension properties and is not prone to separation or sedimentation during storage, ensuring that the glaze composition remains uniform. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the process of the present invention;

[0030] Figure 2 This is a schematic diagram of the plate surface pretreatment of the present invention;

[0031] Figure 3 This is a schematic diagram of the relief carving of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0033] This invention provides a bamboo charcoal board relief carving process, which improves upon the problems of rough carving, blurred relief outlines, and insufficient detail expression in traditional processes by dividing the carving process into two steps: rough milling of the outline and fine milling of the details. It also prevents the accumulation of dust from causing uneven coloring and glazing in subsequent processes, thus improving the overall quality of the relief carving. The invention also optimizes the ratio and treatment of ceramic glaze, and allows the glaze to stand and level after application, eliminating defects such as glaze bubbles, drips, and local glaze accumulation, and ensuring that the glaze layer completely and evenly covers the relief surface.

[0034] Please see Figure 1-3A process for making bamboo charcoal board relief carving includes the following steps: Step 1: Raw material forming and pretreatment of the board surface, processing bamboo scraps into a flat bamboo charcoal substrate; Step 2: CNC three-dimensional relief carving and groove cleaning, retrieving the preset relief pattern program, and using a CNC carving machine in two processes: rough milling of the outline and fine milling of the details, milling the three-dimensional relief groove on the front of the bamboo charcoal substrate. The milling depth varies according to the relief type: 2mm for shallow relief, 3mm for medium relief, and 5mm for deep relief. The edges of the relief outline are rounded by 0.4mm. After carving, the residual bamboo charcoal powder in the relief groove is blown away, and a 0.3mm flat support surface is reserved at the bottom of the groove to prevent material accumulation; Step 3: Overall sealing and priming and layered coloring of the relief, preparing a water-based sealing primer containing water-based acrylic resin, talc powder, and defoamer, and applying it in two coats to the entire surface of the bamboo charcoal substrate and all the concave and convex inner walls of the relief; Step 4: Low-temperature ceramic glaze preparation and relief glazing treatment, applying glaze to the relief.

[0035] Step 5: Segmented low-temperature glaze curing and finished product protection. The glazed slab is placed in a constant temperature oven and baked in two stages with controlled temperature for a total baking time of 80 minutes, further protecting the finished product. By dividing the carving process into two steps, rough milling of the outline and fine milling of the details, combined with rounded corners of the relief edges, reserved support surfaces at the bottom of the groove, and post-carving powder removal, the problems of rough carving, blurred relief outlines, and insufficient detail expression in traditional techniques are improved. At the same time, it avoids edge chipping and chipping of the slab, and also prevents dust accumulation that could cause uneven coloring and glaze thickness in subsequent processes, thus improving the overall processing quality of the relief. The ratio and treatment of ceramic glaze are optimized, and the glaze is allowed to stand and level after application, which can eliminate defects such as glaze bubbles, runs, and local glaze accumulation, allowing the glaze layer to completely and evenly cover the relief surface.

[0036] In step one, the raw material forming and pretreatment of the board surface involve first vibrating and screening the bamboo scraps to remove impurities such as stones and soil. The screened bamboo scraps are then subjected to high-temperature carbonization and crushing to obtain 300-mesh bamboo charcoal powder. This 300-mesh bamboo charcoal powder is mixed with environmentally friendly water-based cassava starch adhesive as a binder and pressed into a board blank under a pressure of 10 MPa. The board blank is then maintained at a low temperature of 50°C. The substrate is then cured and molded to obtain a flat bamboo charcoal substrate. The flat bamboo charcoal substrate is then sanded to remove burrs and protrusions from its surface. Further cleaning and sanding remove any remaining dust and impurities from the surface of the flat bamboo charcoal substrate. In step three, each coat of paint is applied to the flat surface and relief area of ​​the bamboo charcoal substrate and air-dried at room temperature for 30 minutes to seal the capillary pores of the substrate and prevent subsequent paint seepage and color absorption. After the primer dries completely, water-based mineral pigments are mixed and applied in three thin layers to the relief area. After each layer dries, the pigment depth is adjusted according to the relief level to enhance the visual effect of the three-dimensional texture.

[0037] In step four, the low-temperature ceramic glaze is prepared and the relief glaze is applied. The raw materials are mixed according to the following weight ratio: 70 parts low-temperature ceramic glaze base, 10 parts inorganic mineral pigment, 2 parts suspending agent, and 20 parts deionized water. The mixture is thoroughly stirred and ground until the glaze fineness is 400 mesh. After standing, there is no layering or sedimentation. The glaze is then applied to completely cover all the concave and convex structures of the relief. The glaze thickness is controlled at 0.3 mm. After glazing, the mixture is left to stand at room temperature for 15 minutes to allow it to level naturally and eliminate defects such as dripping and glaze accumulation. In step five, the two-stage temperature-controlled baking process involves a pre-baking stage at 80℃ to remove moisture from the gaps between the board and the relief. The second stage involves low-temperature sintering at 150℃ to ensure a firm bond between the ceramic glaze and the bamboo charcoal relief surface. The maximum temperature is strictly controlled to prevent board deformation and charcoal powder precipitation. After baking and natural cooling to room temperature, a 0.1 mm thick layer of water-based polyurethane matte wear-resistant varnish is sprayed onto the entire board surface. After air drying at 30℃, the finished product of the three-dimensional relief bamboo charcoal board with ceramic glaze is obtained.

[0038] In step two, the rough milling of the outline is mainly used to process the overall shape of the relief, while the fine milling of the details is used to carve the texture and shape of the relief surface. The two processes work together to ensure that the relief shape is complete and the texture is clear. In step two, the edges of the relief outline are rounded to avoid chipping or flaking at the edges of the board. At the same time, it can make the coating transition of the subsequent coloring and glazing processes smoother. In step two, a flat support surface is reserved at the bottom of the relief groove to effectively prevent the pigment and glaze from accumulating in large quantities at the bottom of the groove and ensure that the coating thickness is uniform throughout the board.

[0039] The water-based sealing primer used in step three can seal the pores inside the bamboo charcoal substrate, preventing the substrate from absorbing large amounts of subsequent pigments and glazes, saving production materials while ensuring the coloring and glazing effects. In step three, water-based mineral pigments are applied in thin layers, with each layer completely air-dried before the next layer is applied. This effectively prevents pigment dripping and color mixing, creating natural color layers based on the relief's textured structure. The low-temperature ceramic glaze prepared in step four has excellent suspension properties and will not separate or settle over a long period of time. This ensures uniform glaze composition during the glazing process. After glazing, allowing it to stand for a period of time allows for natural leveling, enabling the glaze to evenly cover the relief surface, removing bubbles and marks from the glaze layer, and preventing problems such as drips and localized glaze accumulation.

[0040] In step five, a two-stage temperature-controlled baking method is used to process the glazed board. First, a pre-baking operation is carried out to remove internal moisture, and then low-temperature sintering is performed to gradually complete the curing of the glaze layer, which can effectively protect the bamboo charcoal substrate from high-temperature damage. Finally, the water-based polyurethane matte wear-resistant varnish is sprayed in step five, covering the entire surface of the board. This can protect the internal glaze layer and pigment layer, and also improve the wear resistance and stain resistance of the bamboo charcoal board surface, extending the service life of the board.

[0041] The workflow of this invention is as follows: First, the raw material forming and board surface pretreatment stage begins. Production personnel first put the collected bamboo scraps into a screening device, and remove various impurities such as stones and mud mixed in the raw materials through vibrating screening to ensure the purity of the raw materials. The screened bamboo scraps are then sent to a carbonization device for high-temperature carbonization treatment, and then crushed into bamboo charcoal powder of standard fineness. Subsequently, environmentally friendly water-based cassava starch glue is added to the bamboo charcoal powder as a bonding material. After thorough mixing, it is sent to a pressing and molding device and pressed into a board blank under a set pressure. The formed board blank is placed in a low-temperature environment for curing. After the blank is completely shaped, a flat bamboo charcoal substrate is obtained. Then, a grinding device is used to thoroughly grind the surface of the bamboo charcoal substrate to remove burrs and protrusions on the surface of the board. After grinding, the residual dust and impurities on the board surface are cleaned to ensure that the board surface is clean and flat, completing the preliminary substrate preparation work.

[0042] Next, CNC 3D relief carving and tank cleaning are carried out. The operator imports the pre-designed relief pattern program into the CNC carving equipment, selects the processing depth corresponding to shallow relief, medium relief, or deep relief according to product requirements, and starts the equipment to carve the front of the bamboo charcoal substrate. The carving process is divided into two steps. First, the overall outline of the relief is processed by rough milling, and then the details and textures of the relief surface are carved by fine milling to ensure that the relief shape is complete and the texture is clear. After carving, the edges of the relief outline are rounded to avoid chipping and chipping during subsequent processing and use, and to make the coating transition smoother. This process also leaves a flat support surface at the bottom of the relief tank to prevent a large amount of material from accumulating during subsequent coloring and glazing. After all carving is completed, the bamboo charcoal powder remaining in the relief tank is thoroughly blown away with a blower to prevent dust from affecting subsequent construction processes.

[0043] Next, the overall sealing and priming process is carried out, followed by the layered coloring of the relief. The staff prepares a water-based sealing primer according to the formula. This primer is composed of water-based acrylic resin, talcum powder, and defoamer. Using a brush, the sealing primer is evenly applied in two coats to the entire flat surface of the bamboo charcoal substrate and all the concave and convex inner walls of the relief. After each coat, it is left to air dry at room temperature. The sealing primer seals the capillary pores inside the bamboo charcoal board, preventing the board from absorbing subsequent pigments and glazes. After the primer is completely dry, water-based mineral pigments are prepared and applied in thin layers to the relief area. A total of three layers are applied in sequence. Each layer of pigment is allowed to dry completely before the next layer is applied. During the construction, the depth and color difference of the pigments are adjusted according to the concave and convex structure of the relief to highlight the three-dimensional texture of the relief and make the overall visual effect more layered.

[0044] The process progresses to the stage of low-temperature ceramic glaze preparation and relief glazing. Low-temperature ceramic glaze base, inorganic mineral pigment, suspending agent and deionized water are taken in sequence according to a fixed weight ratio. All raw materials are mixed and stirred thoroughly, and then finely ground to obtain a low-temperature composite ceramic glaze with the required fineness. The prepared glaze will not separate or precipitate after standing, and the glaze composition is uniform and stable. Then, the prepared glaze is completely coated onto the entire surface of the relief structure, and the glaze thickness is strictly controlled. After glazing, the board is left to stand at room temperature for a period of time to allow the glaze to flow naturally and remove air bubbles on the glaze surface, thus completely solving problems such as dripping and local glaze accumulation.

[0045] Finally, a segmented low-temperature glaze curing and finished product protection process is performed. The glazed bamboo charcoal board is placed inside a constant-temperature drying tunnel, which uses a two-stage temperature control mode for baking. The total baking time is kept at eighty minutes. The first stage is a pre-baking stage, which uses a lower temperature to remove moisture remaining inside the board and in the gaps of the relief. The second stage raises the temperature for low-temperature sintering, allowing the ceramic glaze layer to adhere firmly to the surface of the bamboo charcoal relief. The entire baking process strictly controls the upper temperature limit to prevent the bamboo charcoal substrate from deforming due to heat and the precipitation of internal carbon powder. After baking, the board is taken out and allowed to cool naturally to room temperature. Then, a layer of water-based polyurethane matte wear-resistant varnish is evenly sprayed on the surface of the entire board. After spraying, it is air-dried at the corresponding temperature. After the varnish cures, it forms a comprehensive protection for the board, pigment layer and glaze layer. At this point, the entire bamboo charcoal board relief processing process is completed, and a qualified finished product with ceramic glaze three-dimensional relief bamboo charcoal board is obtained.

[0046] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A process for making relief carvings on bamboo charcoal boards, characterized in that, The manufacturing process includes the following steps: Step 1: Raw material forming and board surface pretreatment, processing bamboo scraps into flat bamboo charcoal substrates; Step 2: CNC 3D relief carving and groove cleaning. The preset relief pattern program is retrieved, and a CNC carving machine is used in two processes: rough milling of the outline and fine milling of the details. A 3D relief groove is milled on the front of the bamboo charcoal substrate. The milling depth varies depending on the relief type: 2mm for shallow relief, 3mm for medium relief, and 5mm for deep relief. The edges of the relief outline are rounded with a 0.4mm radius. After carving, any remaining bamboo charcoal powder in the relief groove is blown away. A 0.3mm flat support surface is left at the bottom of the groove to prevent material accumulation. Step 3: Overall sealing and basting, layering and coloring of the relief. Mix water-based sealing primer containing water-based acrylic resin, talc powder and defoamer, and apply it in two coats to the flat surface of the bamboo charcoal substrate and all the concave and convex inner walls of the relief. Step 4: Low-temperature ceramic glaze preparation and relief glazing treatment, including the application of relief glaze. Step 5: Segmented low-temperature glaze curing and finished product protection. The glazed slab is sent into a constant temperature oven and baked in two stages with controlled temperature. The total baking time is 80 minutes, which further protects the finished product.

2. The bamboo charcoal board relief carving process according to claim 1, characterized in that, In step one, the raw material forming and pretreatment of the board surface are carried out by first vibrating and screening the bamboo scraps to remove impurities such as stones and soil. Then, the screened bamboo scraps are carbonized and crushed at high temperature to obtain 300-mesh bamboo charcoal powder. The 300-mesh bamboo charcoal powder is mixed with environmentally friendly water-based cassava starch as a binder and pressed into a board blank under a pressure of 10MPa. The board blank is then kept at a low temperature of 50℃ for curing to obtain a flat bamboo charcoal substrate. The flat bamboo charcoal substrate is then polished to remove burrs and protrusions on the surface. Finally, the dust and impurities remaining on the surface of the flat bamboo charcoal substrate after polishing are cleaned. In step three, each coat of the bamboo charcoal substrate is air-dried at room temperature for 30 minutes to seal the capillary pores of the substrate and prevent subsequent seepage and color absorption. After the primer is completely dry, water-based mineral pigments are mixed and applied in three thin layers to the relief area. After each layer is air-dried, the pigment depth and color difference are adjusted according to the relief level to enhance the visual effect of the three-dimensional texture. The preparation of low-temperature ceramic glaze and relief glazing in step four involves mixing raw materials according to the following weight ratio: 70 parts low-temperature ceramic glaze base, 10 parts inorganic mineral pigment, 2 parts suspending agent, and 20 parts deionized water. The mixture is thoroughly stirred and ground until the glaze fineness reaches 400 mesh. After standing, there is no stratification or sedimentation. The glaze is then applied to completely cover all the concave and convex structures of the relief. The glaze thickness is controlled at 0.3 mm. After glazing, the mixture is left to stand at room temperature for 15 minutes to allow it to level naturally and eliminate defects such as dripping and glaze accumulation. In step five, the first stage of pre-baking at 80℃ removes moisture from the gaps between the board and the relief. The second stage is low-temperature sintering at 150℃ to firmly bond the ceramic glaze with the bamboo charcoal relief surface. The maximum temperature is strictly controlled to prevent board deformation and charcoal powder precipitation. After baking and natural cooling to room temperature, a 0.1mm thick layer of water-based polyurethane matte wear-resistant varnish is sprayed onto the entire board surface. After air drying at 30℃, the finished product of the three-dimensional relief bamboo charcoal board with ceramic glaze is obtained.

3. The bamboo charcoal board relief carving process according to claim 2, characterized in that, The rough milling operation described in step two is mainly used to process the overall shape of the relief, while the fine milling operation is used to carve the texture and shape of the relief surface. The two processes work together to ensure that the relief shape is complete and the texture is clear.

4. The bamboo charcoal board relief carving process according to claim 3, characterized in that, In step two, the edges of the relief outline are rounded to prevent chipping and flaking of the board edges, and also to make the coating transition of the subsequent coloring and glazing processes smoother.

5. The bamboo charcoal board relief carving process according to claim 4, characterized in that, In step two, a flat support surface is reserved at the bottom of the relief groove, which can effectively prevent pigments and glazes from accumulating in large quantities at the bottom of the groove and ensure that the coating thickness is uniform throughout the board.

6. The bamboo charcoal board relief carving process according to claim 5, characterized in that, The water-based sealing primer used in step three can seal the pores inside the bamboo charcoal substrate, preventing the substrate from absorbing large amounts of subsequent pigments and glazes, saving production materials while ensuring the coloring and glazing effects.

7. The bamboo charcoal board relief carving process according to claim 6, characterized in that, In step three, water-based mineral pigments are applied in thin layers. Each layer of pigment is allowed to dry completely before the next layer is applied. This effectively prevents pigment from flowing or mixing, and creates natural color layers by relying on the embossed texture.

8. The bamboo charcoal board relief carving process according to claim 7, characterized in that, The low-temperature ceramic glaze prepared in step four has good suspension properties and will not separate or settle after a long time. This ensures that the glaze composition is uniform during the glazing process. After glazing, the glaze can be left to stand for a period of time to allow it to level naturally, which allows the glaze to cover the relief surface evenly, removes bubbles and marks on the glaze surface, and prevents problems such as drips and local glaze accumulation.

9. The bamboo charcoal board relief carving process according to claim 8, characterized in that, In step five, the glazed board is treated with the two-stage temperature-controlled baking method. First, a pre-baking operation is carried out to remove internal moisture, and then low-temperature sintering is carried out to gradually complete the curing of the glaze layer, which can effectively protect the bamboo charcoal substrate from high-temperature damage.

10. The bamboo charcoal board relief carving process according to claim 9, characterized in that, The water-based polyurethane matte wear-resistant varnish sprayed at the end of step five covers the entire surface of the board, which can protect the internal glaze and pigment layers, improve the wear resistance and stain resistance of the bamboo charcoal board surface, and extend the service life of the board.

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