Arc-shaped bamboo-wood composite material processing method and arc-shaped bamboo-wood composite material

Abstract

The application provides an arc-shaped bamboo-wood composite material processing method and an arc-shaped bamboo-wood composite material. The arc-shaped bamboo-wood composite material processing method comprises the following steps: segmenting and classifying the outer diameter size of a bamboo cylinder; cutting the segmented bamboo cylinder according to the length and the circumference of the small end to obtain a plurality of arc-shaped bamboo pieces; removing the inner and outer bamboo joints of the arc-shaped bamboo pieces, heat treating the arc-shaped bamboo pieces, and expanding the inner and outer arc radii of the heat-treated arc-shaped bamboo pieces to obtain modified arc-shaped bamboo pieces; drying and shaping the modified arc-shaped bamboo pieces to obtain fixed arc-shaped bamboo pieces; classifying the fixed arc-shaped bamboo pieces according to the outer arc chord length to obtain adjusted arc-shaped bamboo pieces; and gluing the wood veneer on both sides, assembling the adjusted arc-shaped bamboo pieces with the wood veneer, and pressing the adjusted arc-shaped bamboo pieces and the wood veneer. Through the above method, an arc-shaped bamboo-wood composite material is obtained. The processing method can significantly improve the utilization rate of bamboo and greatly expand the use space of bamboo.

Description

Technical Field

[0001] This invention belongs to the field of materials processing, specifically, it relates to a processing method for curved bamboo-wood composite materials and curved bamboo-wood composite materials. Background Technology

[0002] Bamboo has a hollow, conical shell structure, with the bamboo culms tapering to a point, thinner at the top and thicker at the bottom, exhibiting significant anisotropy. The industrial utilization of bamboo mainly falls into two categories. One is directly utilizing the shape of round bamboo to create furniture, buildings, etc. However, the varied shapes and irregular tubular forms of round bamboo prevent its use as standard tubing, limiting its utilization efficiency. Furthermore, the mechanical and weather resistance properties of round bamboo have limitations, requiring improvement measures. The other method involves splitting and refining the bamboo into basic units of different shapes, such as rectangular strips, bamboo strips, bamboo bundles, and bamboo shavings, which are then reassembled into boards and squares. However, this process is highly destructive to the bamboo raw material, necessitating measures to protect its original properties and texture. Secondly, the amount of adhesive used is also substantial, potentially affecting environmental performance and easily causing the loss of the bamboo's original elegant texture, feel, and good physical and mechanical properties. Therefore, strict control of process parameters and quality standards is required during the splitting, refining, and reassembly processes, resulting in relatively high costs. Summary of the Invention

[0003] To address the shortcomings of existing bamboo engineering material processing methods, such as low bamboo utilization and severe fragmentation, this invention proposes a processing method for preparing arc-shaped bamboo-wood composite engineering materials. This method can significantly improve the utilization rate of bamboo, greatly expand the application scope of bamboo, and allow bamboo, a material with a long history, to enter industrial use in its original, natural, and standardized form, which is more in line with the current concept of green living.

[0004] According to one aspect of the present invention, a method for processing arc-shaped bamboo-wood composite materials is provided, which may include the following steps:

[0005] - The bamboo tubes are divided into sections and graded according to their outer diameter;

[0006] - The graded bamboo tubes are split according to the circumference and length of the small end to obtain multiple arc-shaped bamboo strips;

[0007] - The inner and outer bamboo nodes of the arc-shaped bamboo strip are removed and heat-treated. The heat-treated arc-shaped bamboo strip is then subjected to an arc-expansion treatment to increase the inner and outer arc radii to obtain the modified arc bamboo strip.

[0008] - The modified bamboo strips are dried and shaped to obtain fixed-arc bamboo strips;

[0009] - The fixed-arc bamboo strips are graded and classified according to the outer arc chord length to obtain adjustable-arc bamboo strips; and

[0010] - Apply glue to both sides of the wood veneer, and then press the curved bamboo strips together with the wood veneer blank.

[0011] According to one aspect of the present invention, an arc-shaped bamboo-wood composite material is provided, which may include an arc-shaped bamboo-wood composite material obtained by the arc-shaped bamboo-wood composite material processing method according to the present invention.

[0012] According to embodiments of the present invention, the arc-shaped bamboo-wood composite material prepared by the above method effectively improves the utilization rate of bamboo, maintains the original gradient structure and surface texture characteristics of bamboo, and reduces the generation of waste and dust during processing. Compared with simple arc-shaped bamboo strip assembled with glue, the density and mechanical properties of the bamboo-wood composite material can be effectively controlled by a suitable ratio of bamboo and wood units. Furthermore, compared with simple arc-shaped bamboo strip assembled with glue, the bamboo-wood composite method can reduce the cracking of bamboo strips during the gluing process and has a higher tolerance for the difference in the inner and outer arc radii of the arc-shaped bamboo strips. Furthermore, compared with simple arc-shaped bamboo strip assembled with glue, by applying glue to both sides of the wood veneer, there is no need to apply glue to the bamboo strips, which can greatly improve the gluing efficiency, reduce the gluing difficulty, and result in a more uniform glue distribution. Attached Figure Description

[0013] Figure 1 This is a flowchart illustrating a method for processing arc-shaped bamboo-wood composite materials according to an embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram illustrating a method for processing arc-shaped bamboo-wood composite materials according to an embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram illustrating an arc-shaped bamboo-wood composite material according to an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram illustrating an arc-shaped bamboo-wood composite material according to another embodiment of the present invention. Detailed Implementation

[0017] The embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description of the embodiments disclosed herein, detailed descriptions of known functions and configurations incorporated herein may render the subject matter of the disclosed embodiments quite unclear, such descriptions will be omitted. Furthermore, the accompanying drawings are provided only for a better understanding of the embodiments disclosed herein and are not intended to limit the technical ideas disclosed herein. Therefore, it should be understood that the drawings include all modifications, equivalents, and alternatives within the scope and spirit of the invention.

[0018] Unless otherwise defined, all terms, including technical or scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms such as those defined in commonly used dictionaries shall be interpreted as consistent with their meaning in the context of the relevant art. Unless expressly defined in this invention, these terms shall not be construed as having an ideal or overly formal meaning.

[0019] As used in this article, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise.

[0020] It will be further understood that the terms “comprising,” “including,” and / or “having” as used herein specify the presence of the stated features, integers, steps, operations, elements, components, or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

[0021] In addition, for the sake of understanding and ease of description, the dimensions and thicknesses of the various structures shown in the accompanying drawings are arbitrarily shown, but the invention is not limited thereto, and for clarity, the thicknesses of layers, films, plates, regions, etc., are exaggerated.

[0022] Figure 1 This is a flowchart illustrating a method for processing arc-shaped bamboo-wood composite materials according to an embodiment of the present invention.

[0023] Reference Figure 1 The processing method for composite material of curved bamboo strips and wood veneer provided by the present invention (i.e., processing method for curved bamboo-wood composite material) may include the following steps:

[0024] - The bamboo tubes are divided into sections and graded according to their outer diameter;

[0025] - The graded bamboo tubes are split according to the circumference and length of the small end to obtain multiple arc-shaped bamboo strips;

[0026] - The inner and outer bamboo nodes of the arc-shaped bamboo strip are removed and heat-treated. The heat-treated arc-shaped bamboo strip is then subjected to an arc-expansion treatment to increase the inner and outer arc radii to obtain the modified arc bamboo strip.

[0027] - The modified bamboo strips are dried and shaped to obtain fixed-arc bamboo strips;

[0028] - The fixed-arc bamboo strips are graded and classified according to the outer arc chord length to obtain adjustable-arc bamboo strips; and

[0029] - Apply glue to both sides of the wood veneer, and then press the curved bamboo strips together with the wood veneer blank.

[0030] Specifically, according to embodiments of the present invention, the selection of bamboo is crucial when manufacturing curved bamboo-wood composites. Different types of bamboo have different growth habits and physical properties, so selecting a suitable bamboo species for manufacturing curved bamboo strips is also important. For example, moso bamboo, due to its tall stature, thick walls, and long internodes, is often used to make curved bamboo strips.

[0031] Furthermore, select well-grown, sturdy bamboo as raw material. Ensure that the bamboo is free of cracks and insect damage, and has a uniform diameter.

[0032] Furthermore, use a professional circular saw blade assembly or similar cutting tool to ensure a smooth, burr-free cut. Measure the outer diameter of the bamboo tubes and establish a grading standard for outer diameter dimensions. For example, bamboo tubes can be divided into different grades such as small diameter, medium diameter, and large diameter. Each bamboo tube is then classified into the corresponding grade based on its outer diameter data.

[0033] Furthermore, in the processing of bamboo products (such as furniture and handicrafts), the moisture content of bamboo strips is crucial to the quality and stability of the products. Excessive moisture content may cause the bamboo strips to deform or crack during processing, and may even affect the product's lifespan.

[0034] In this embodiment, the selected bamboo tubes are cut and graded, and the graded bamboo tubes are split into at least two parts.

[0035] In addition, the inner and outer nodes of the split curved bamboo strips are removed, and the bamboo strips are further processed and treated, such as grinding and polishing, to improve their quality and appearance.

[0036] Furthermore, the curved bamboo strips softened by steam are easier to process and handle in subsequent steps. During the steam softening process, the temperature and time should be strictly controlled to avoid over-softening or under-softening.

[0037] Next, place the softened bamboo strip into the expansion mold, ensuring a tight fit between the bamboo strip and the mold. Apply appropriate pressure or deformation force to the mold to gradually deform the bamboo strip to the desired curvature. Closely monitor the deformation of the bamboo strip during the expansion process to avoid excessive deformation or breakage.

[0038] Furthermore, in some cases, bamboo strips may deform during processing or use due to stress concentration or external factors. Arc-expansion treatment can disperse these stresses, improving the overall stability and durability of the bamboo strips.

[0039] Furthermore, after the arc expansion is completed, the obtained modified bamboo strips are removed from the mold and subjected to necessary shaping treatment to fix their deformed shape.

[0040] Furthermore, after the modified bamboo strips are dried and shaped, they are graded and sorted again to improve the utilization rate of bamboo materials and the uniformity of products.

[0041] Furthermore, by precisely measuring and grading the outer arc chord length, curved bamboo strips can be more finely divided into different grades, ensuring that each strip is fully utilized. This avoids waste caused by size mismatch and improves the overall utilization rate of bamboo materials.

[0042] Furthermore, curved bamboo strips of the same grade are more similar in size and shape, which helps to improve the uniformity and overall quality of the final product. Different grades of curved bamboo strips can meet the needs of different customers or products, making the products more diversified and more competitive in the market.

[0043] Furthermore, in subsequent processing, since the curved bamboo strips have been graded according to the outer arc chord length, they can be cut and polished more easily, simplifying the production process.

[0044] Furthermore, the curved bamboo strips, after being modified, can indeed undergo a series of processing steps to enhance their durability and aesthetics, and then be glued with wood veneer to form a composite material.

[0045] According to an embodiment of the present invention, the modified bamboo strips can be carbonized, treated with anti-corrosion and anti-mildew agents, and then glued together with wood veneer to form a composite material.

[0046] Furthermore, carbonization is a process of treating bamboo strips at high temperatures, designed to improve their dimensional stability and weather resistance, while also giving them a unique color and texture. Carbonized bamboo strips are more stable and less prone to deformation and cracking.

[0047] Furthermore, preservative treatment is to prevent bamboo strips from being eroded by microorganisms (such as fungi and bacteria) during use, thereby extending their service life. Common preservative methods include soaking in preservatives and spraying with preservative coatings. These preservatives are usually low in toxicity and environmentally friendly, and harmless to humans and the environment.

[0048] Furthermore, the anti-mold treatment is similar to the anti-corrosion treatment, but focuses more on preventing mold growth. Mold not only affects the appearance of bamboo strips but can also damage their structure. Therefore, anti-mold treatment during bamboo strip processing is very important.

[0049] Furthermore, the composite material obtained by gluing together curved bamboo strips that have undergone carbonization, anti-corrosion, and anti-mildew treatment with wood veneer not only possesses the advantages of both bamboo strips and wood veneer, such as the hardness and wear resistance of bamboo strips and the texture and aesthetics of wood veneer, but also has good overall performance and stability.

[0050] Furthermore, double-sided gluing is applied to the wood veneer, typically using environmentally friendly, high-strength adhesives such as phenolic resin, polyurethane adhesive, and urea-formaldehyde resin adhesive. In wood processing and composite material manufacturing, gluing is a crucial step that significantly impacts the performance of the final product. The amount of glue applied affects the bond strength and the cost of the final product. Insufficient glue may lead to insufficient bond strength, while excessive glue increases costs and may affect other product properties. Therefore, it is necessary to select an appropriate amount of glue based on the specific circumstances.

[0051] On the other hand, applying adhesive can improve the overall performance of wood veneer, such as water resistance, heat resistance and electrical insulation.

[0052] Furthermore, the curved bamboo strips are arranged and combined according to the design requirements to ensure consistency in curvature and size.

[0053] Next, glued wood veneers are placed over the arranged bamboo strips, and clamps or pressure plates are used to fix the assembled pieces together to prevent displacement or deformation during the assembly process.

[0054] Next, the preforms are placed in a hot press or cold press for assembly. After assembly, the composite material is removed and placed in a ventilated and dry place for curing to ensure that the adhesive is fully cured and achieves the best bonding effect.

[0055] Figure 2 This is a schematic diagram illustrating a method for processing arc-shaped bamboo-wood composite materials according to an embodiment of the present invention.

[0056] According to one aspect of the invention, with reference to Figure 2 The processing method for arc-shaped bamboo-wood composite materials provided by the present invention may include the following steps: (1) Bamboo grading: the newly harvested round bamboo is cut into sections and the outer diameter of the bamboo tubes after sectioning is graded; (2) Bamboo splitting: the graded bamboo tubes are split into at least 2 parts according to the circumference of the small end and the size of the required arc-shaped bamboo pieces; (3) Softening and arc modification: the inner and outer nodes of the split arc-shaped bamboo pieces are removed, and after heat treatment, the inner and outer arc radii of the arc-shaped bamboo pieces are expanded by a sampling arc expansion device. The heat treatment methods include, but are not limited to: steam, drying, boiling, microwave, high frequency, etc.; (4) Drying and shaping: the arc-shaped bamboo pieces after arc modification are dried and shaped, or they can be fixed in a drying and shaping device and then dried. (5) Secondary grading: The curved bamboo strips after the arc is fixed are graded according to the outer arc chord length, and the grading gradient is set to 5mm; (6) Gluing: Glue is applied to both sides of the wood veneer, but no glue is applied to the curved bamboo strips; (7) Assembly and gluing: The curved bamboo strips after the arc is adjusted are assembled with the wood veneer and glued together.

[0057] According to an embodiment of the present invention, the outer diameter of the bamboo tube is 120 mm, and it is split into 4 parts with a moisture content of about 85%.

[0058] According to an embodiment of the present invention, in the heat treatment of the arc-shaped bamboo strip, the arc-shaped bamboo strip is softened by steam at 180°C for 8 minutes.

[0059] According to an embodiment of the present invention, the inner and outer nodes of the softened bamboo strips are removed using an integrated node removal and arc expansion machine, and the bamboo strips are then subjected to arc expansion treatment.

[0060] According to an embodiment of the present invention, the expanded bamboo strips are fixed in a drying and shaping mold and placed in a drying kiln to dry to a moisture content of less than 10%.

[0061] According to an embodiment of the present invention, the dried and shaped curved bamboo strips are graded according to the outer arc chord length, with the grading gradient set at 5 mm. This more precise grading allows the curved bamboo strips to be applied in more fields, offering advantages such as improved material utilization, enhanced product quality, optimized production processes, promotion of technological innovation and research and development, and significant economic and social benefits.

[0062] According to an embodiment of the present invention, the wood veneer is glued on both sides, the glue being phenolic resin, and the glue application rate being 150~200 g / m². 2 The curved bamboo strips are not glued.

[0063] According to an embodiment of the present invention, the curved bamboo strip and the wood veneer are glued together using a hot-pressing temperature of 145°C and a gluing pressure of 1.8 MPa.

[0064] According to one aspect of the present invention, an arc-shaped bamboo-wood composite material is provided, which may include an arc-shaped bamboo-wood composite material obtained by the arc-shaped bamboo-wood composite material processing method according to the present invention.

[0065] According to an embodiment of the present invention, the wood veneer is selected from fast-growing poplar veneer with a thickness of 1.5 mm.

[0066] According to another embodiment of the present invention, referring to Figure 2The processing method for arc-shaped bamboo-wood composite materials provided by the present invention may include the following steps: (1) Bamboo grading: the newly harvested round bamboo is cut into sections and the outer diameter of the bamboo tubes after sectioning is graded; (2) Bamboo splitting: the graded bamboo tubes are split into at least 2 parts according to the circumference of the small end and the size of the required arc-shaped bamboo pieces; (3) Softening and arc modification: the inner and outer nodes of the split arc-shaped bamboo pieces are removed, and after heat treatment, the inner and outer arc radii of the arc-shaped bamboo pieces are expanded by a sampling arc expansion device. The heat treatment methods include, but are not limited to: steam, drying, boiling, microwave, high frequency, etc.; (4) Drying and shaping: the arc-shaped bamboo pieces after arc modification are dried and shaped, or they can be fixed in a drying and shaping device and then dried. (5) Secondary grading: The curved bamboo strips after the arc is fixed are graded according to the outer arc chord length, and the grading gradient is set to 5mm; (6) Gluing: Glue is applied to both sides of the wood veneer, but no glue is applied to the curved bamboo strips; (7) Assembly and gluing: The curved bamboo strips after the arc is adjusted are assembled with the wood veneer and glued together.

[0067] According to an embodiment of the present invention, the outer diameter of the bamboo tube is 110 mm, and it is split into 4 parts with a moisture content of about 35%.

[0068] According to an embodiment of the present invention, in the drying and shaping of the modified bamboo strips, an initial pressure of 0.05 MPa is applied, and the drying temperature is set to 140°C for approximately 2.5 h.

[0069] According to an embodiment of the present invention, in the grading of the modified bamboo strips, the grading gradient is 5mm.

[0070] According to an embodiment of the present invention, the curved bamboo strip and the wood veneer are glued together using a hot-pressing temperature of 145°C and a gluing pressure of 1.8 MPa.

[0071] According to one aspect of the present invention, an arc-shaped bamboo-wood composite material is provided, which may include an arc-shaped bamboo-wood composite material obtained by the arc-shaped bamboo-wood composite material processing method according to the present invention.

[0072] According to an embodiment of the present invention, the wood veneer is selected from fast-growing poplar veneer with a thickness of 1.5 mm.

[0073] The following will describe in detail the processing method of the arc-shaped bamboo-wood composite material of the present invention and the arc-shaped bamboo-wood composite material obtained by the processing method of the present invention. Specific Implementation Example 1

[0075] like Figure 2As shown, a method for processing arc-shaped bamboo-wood composite materials may include (1) round bamboo grading: cutting newly harvested round bamboo into sections and grading the outer diameter of the bamboo tubes after sectioning; (2) round bamboo splitting: splitting the graded bamboo tubes into at least 2 parts according to the circumference of the small end and the required size of the arc-shaped bamboo pieces; (3) softening and arc modification: removing the inner and outer nodes of the split arc-shaped bamboo pieces, and after heat treatment, using an arc expansion device to expand the inner and outer arc radii of the arc-shaped bamboo pieces. The heat treatment methods include, but are not limited to: steam, drying, boiling, microwave, high frequency, etc.; (4) drying and shaping: drying and shaping the modified arc-shaped bamboo pieces, or fixing them in a drying and shaping device before drying. (5) Secondary grading: The curved bamboo strips after the arc is fixed are graded according to the outer arc chord length, and the grading gradient is set to 5 mm; (6) Gluing: Glue is applied to both sides of the wood veneer, but no glue is applied to the curved bamboo strips; (7) Assembly and gluing: The curved bamboo strips after the arc is adjusted are assembled with the wood veneer and glued together.

[0076] This invention also discloses an arc-shaped bamboo-wood composite material, comprising an arc-shaped bamboo-wood composite material obtained by the above-described processing method, such as... Figure 3 As shown.

[0077] The method for producing curved bamboo-wood composite material may include the following steps:

[0078] (1) Segmentation: Cut fresh bamboo into segments; (2) Splitting: Select fresh bamboo tubes with a length of 1.2 m and an outer diameter of 120 mm and split them into 4 pieces; the moisture content of the bamboo strips is measured to be around 85%; (3) Softening: Soften the bamboo strips with steam at 180℃ for 8 minutes; (4) Arc Expansion: Remove the inner and outer nodes of the softened bamboo strips using an integrated node-removing and arc-expanding machine, and then expand the bamboo strips; (5) Drying and Shaping: Fix the expanded bamboo strips in a drying and shaping mold and dry them in a drying kiln until the moisture content is less than 10%; (6) Grading: Gradient the dried and shaped arc-shaped bamboo strips according to the outer arc chord length, with a grading gradient of 5 mm; (7) Glue Application: Apply glue to both sides of the wood veneer, using phenolic resin, with an application rate of 150~200 g / m 2 (8) Glue-bonded composite material: The curved bamboo strips after the arc is adjusted are assembled with 1.5 mm thick fast-growing poplar veneer and glued together with a hot pressing temperature of 145℃ and a gluing pressure of 1.8 MPa. Specific Implementation Example 2

[0080] like Figure 2As shown, a method for processing arc-shaped bamboo-wood composite materials may include (1) round bamboo grading: cutting newly harvested round bamboo into sections and grading the outer diameter of the bamboo tubes after sectioning; (2) round bamboo splitting: splitting the graded bamboo tubes into at least 2 parts according to the circumference of the small end and the required size of the arc-shaped bamboo pieces; (3) softening and arc modification: removing the inner and outer nodes of the split arc-shaped bamboo pieces, and after heat treatment, using an arc expansion device to expand the inner and outer arc radii of the arc-shaped bamboo pieces. The heat treatment methods include, but are not limited to: steam, drying, boiling, microwave, high frequency, etc.; (4) drying and shaping: drying and shaping the modified arc-shaped bamboo pieces, or fixing them in a drying and shaping device before drying. (5) Secondary grading: The curved bamboo strips after the arc is fixed are graded according to the outer arc chord length, and the grading gradient is set to 5 mm; (6) Gluing: Glue is applied to both sides of the wood veneer, but no glue is applied to the curved bamboo strips; (7) Assembly and gluing: The curved bamboo strips after the arc is adjusted are assembled with the wood veneer and glued together.

[0081] This invention also discloses an arc-shaped bamboo-wood composite material, comprising an arc-shaped bamboo-wood composite material obtained by the above-described processing method, such as... Figure 4 As shown.

[0082] The method for producing curved bamboo-wood composite material may include the following steps:

[0083] (1) Segmentation: Cut fresh bamboo into segments; (2) Splitting: Select bamboo tubes with a length of 1.2 m and an outer diameter of 110 mm and split them into 4 parts; the moisture content of the bamboo strips is measured to be around 35%; (3) Removing nodes: Remove the inner and outer nodes of the split curved bamboo strips using an angle grinder; (4) Expanding the arc: Place the removed curved bamboo strips in a drying and arc-fixing device and fix them. Apply an initial pressure of 0.05 MPa to the bamboo strips through the arc-fixing device. Place the bamboo strips and the device together in a drying kiln and set the drying temperature to 140℃. After drying for about 2.5 h, remove the bamboo strips; (6) Grading: Gradient the dried and shaped curved bamboo strips according to the outer arc chord length. The grading gradient is set to 5 mm; (7) Applying glue: Apply glue to both sides of the wood veneer. The glue type is phenolic resin, and the glue application amount is 150~200 g / m 2 (8) Glue-bonded composite material: The curved bamboo strips after the arc is adjusted are assembled with 1.5 mm thick fast-growing poplar veneer and glued together with a hot pressing temperature of 145℃ and a gluing pressure of 1.8 MPa.

[0084] Through the above processing method, an arc-shaped bamboo-wood composite material is obtained (see...). Figure 3 and 4 This effectively improves the utilization rate of bamboo, maintains the original gradient structure and surface texture characteristics of bamboo, and reduces the generation of waste and dust during processing.

[0085] In summary, addressing the shortcomings of existing bamboo engineering material processing methods, such as low bamboo utilization and severe fragmentation, this invention proposes a processing method for preparing arc-shaped bamboo-wood composite engineering materials. This method can significantly improve the utilization rate of bamboo and greatly expand its application scope.

[0086] While this teaching has been described with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims. Furthermore, embodiments may be combined to form other embodiments.

Claims

1. A method for processing an arc-shaped bamboo-wood composite material, characterized in that, include: The bamboo tubes are divided into sections and graded according to their outer diameter. The graded bamboo tubes are split according to the circumference and length of the small end to obtain multiple arc-shaped bamboo strips; The arc-shaped bamboo strip is subjected to removal of the inner and outer bamboo nodes, heat treatment, and then the heat-treated arc-shaped bamboo strip is subjected to an arc-expansion treatment to increase the inner and outer arc radii to obtain the modified arc bamboo strip. The modified bamboo strips are dried and shaped to obtain fixed-arc bamboo strips; The fixed-arc bamboo strips are graded and classified according to the outer arc chord length to obtain the adjustable-arc bamboo strips. as well as Double-sided gluing is applied to the wood veneer, and the arc-adjusting bamboo strips, which have undergone carbonization, anti-corrosion and anti-mildew treatment, are pressed together with the wood veneer assembly blank; The process of expanding the inner and outer radii of the heat-treated curved bamboo strips includes: placing the softened bamboo strips into an expansion mold, ensuring that the bamboo strips fit tightly against the mold, and applying appropriate pressure or deformation force to the mold to gradually deform the bamboo strips to the required curvature.

2. The processing method for arc-shaped bamboo-wood composite materials according to claim 1, characterized in that, The bamboo tube has an outer diameter of 120mm and is split into 4 parts. The bamboo strips have a moisture content of 85%.

3. The processing method for arc-shaped bamboo-wood composite materials according to claim 1, characterized in that, The bamboo tube has an outer diameter of 110mm and is split into 4 parts. The moisture content of the bamboo strips is 35%.

4. The processing method for arc-shaped bamboo-wood composite materials according to claim 2, characterized in that, In the heat treatment of the curved bamboo strip, the curved bamboo strip is softened by steam at 180°C for 8 minutes.

5. The processing method for arc-shaped bamboo-wood composite materials according to claim 2, characterized in that, The modified bamboo strips are dried until the moisture content is less than 10%.

6. The processing method for arc-shaped bamboo-wood composite materials according to claim 3, characterized in that, In the drying and shaping of the modified bamboo strips, an initial pressure of 0.05 MPa was applied, and the drying temperature was set to 140℃ for 2.5 h.

7. The processing method for arc-shaped bamboo-wood composite materials according to claim 1, characterized in that, In the grading and classification of the modified bamboo strips, the grading gradient is 5mm.

8. The processing method for arc-shaped bamboo-wood composite materials according to claim 1, characterized in that, The curved bamboo strips are glued to the wood veneer using a hot-pressing temperature of 145°C and a gluing pressure of 1.8 MPa.

9. An arc-shaped bamboo-wood composite material, characterized in that, This includes curved bamboo-wood composites obtained by the curved bamboo-wood composite processing method as described in any one of claims 1 to 8.

10. The arc-shaped bamboo-wood composite material according to claim 9, characterized in that, The wood veneer is made of 1.5 mm thick fast-growing poplar veneer.

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