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

Abstract

The invention provides an arc-shaped bamboo-wood composite material processing method and an arc-shaped bamboo-wood composite material. The processing method of the arc-shaped bamboo-wood composite material comprises the steps that a bamboo tube is subjected to section fixing and outer diameter size grading treatment; dividing the graded bamboo tube according to the perimeter and length of the small end to obtain a plurality of arc-shaped bamboo chips; removing inner and outer bamboo joints from the arc-shaped bamboo chips, carrying out heat treatment, and carrying out arc expansion treatment for expanding inner and outer arc radiuses on the arc-shaped bamboo chips subjected to heat treatment to obtain arc-modified bamboo chips; the arc-modified bamboo chips are dried and shaped, and fixed-arc bamboo chips are obtained; the arc-fixed bamboo chips are graded according to the chord length of the outer arc, and arc-adjustable bamboo chips are obtained; and double-sided gluing is conducted on the wood veneer, and the arc-adjusting bamboo chips and the wood veneer assembly are spliced and pressed. By means of the method, the arc-shaped bamboo-wood composite material is obtained through processing. According to the processing method, the utilization rate of the bamboo wood can be remarkably increased, and the use space of the bamboo wood is greatly expanded.

Description

Technical Field

[0001] The invention belongs to the field of material processing, and in particular relates to a method for processing an arc-shaped bamboo-wood composite material and the arc-shaped bamboo-wood composite material. Background Art

[0002] Bamboo is a hollow conical shell structure, and the bamboo pole is sharp, thin at the top and thick at the bottom, with significant anisotropy. The industrial utilization of bamboo is mainly divided into two ways. One is to directly use the shape of the round bamboo itself to make round bamboo furniture, round bamboo buildings, etc. However, due to the different shapes and irregular round tubes of round bamboo, it cannot be used as a standard pipe, and the utilization efficiency is limited. At the same time, the mechanical properties and weather resistance of round bamboo also have certain limitations, and corresponding measures need to be taken to improve and improve them. The other is to split and refine it, make it into basic units of different shapes, such as rectangular bamboo pieces, bamboo strips, bamboo bundles, bamboo shavings, etc., and then reassemble it into board square materials based on these basic units. However, crushing and reorganization are highly destructive to bamboo raw materials, and corresponding measures need to be taken to protect the original performance and texture of bamboo. Secondly, the amount of adhesive used is also large, which may affect the environmental performance and easily lose the elegant texture, texture and good physical and mechanical properties of the original surface of bamboo. Therefore, in the process of splitting, refining and reorganization, it is necessary to strictly control the process parameters and quality standards, which also results in a relatively high cost. Summary of the invention

[0003] In view of the shortcomings of low bamboo utilization rate and serious shape fragmentation in the processing of existing bamboo engineering materials, the present 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 use space of bamboo, and also allow bamboo with a long history to enter industrial use in its original, natural and standard form, which is more in line with the current green life concept.

[0004] According to one aspect of the present invention, a method for processing an arc-shaped bamboo-wood composite material is provided, which may include the following steps: - Segment and grade the bamboo tubes into different outer diameters; - splitting the graded bamboo tube according to the circumference and length of the small end to obtain a plurality of arc-shaped bamboo pieces; - removing inner and outer bamboo nodes from the arc-shaped bamboo pieces, subjecting the arc-shaped bamboo pieces to heat treatment, and subjecting the arc-shaped bamboo pieces to arc expansion treatment to enlarge the inner and outer arc radii to obtain arc-modified bamboo pieces; - drying and shaping the curved bamboo pieces to obtain curved bamboo pieces; - Classifying the arc-fixing bamboo pieces according to the length of the outer arc chord to obtain arc-adjusting bamboo pieces; and - Applying glue on both sides of the wood veneer, and pressing the arc-adjusting bamboo strips and the wood veneer blanks.

[0005] According to one aspect of the present invention, a curved bamboo-wood composite material is provided, which may include a curved bamboo-wood composite material produced by the method for processing a curved bamboo-wood composite material according to the present invention.

[0006] According to an embodiment of the present invention, the arc-shaped bamboo-wood composite material prepared by the above method effectively improves the utilization rate of bamboo materials, maintains the original gradient structure and surface texture characteristics of bamboo materials, and reduces the generation of waste and dust in the processing process. Compared with the simple arc-shaped bamboo pieces gluing materials, the density and mechanical properties of the bamboo-wood composite material can be effectively regulated by appropriate bamboo-wood unit ratios. Further, compared with the simple arc-shaped bamboo pieces gluing materials, the bamboo-wood composite method can reduce the cracking of bamboo pieces during the gluing process, and the tolerance for the difference between the inner and outer arc radii of the arc-shaped bamboo pieces is relatively high. Further, compared with the simple arc-shaped bamboo pieces gluing materials, by gluing the wood veneer on both sides, there is no need to apply glue on the bamboo pieces, which can greatly improve the gluing efficiency, reduce the difficulty of gluing, and make the glue distribution more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a flow chart showing a method for processing a curved bamboo-wood composite material according to an embodiment of the present invention.

[0008] Figure 2 Schematic diagram showing a method for processing a curved bamboo-wood composite material according to an embodiment of the present invention.

[0009] Figure 3 Schematic diagram showing a curved bamboo-wood composite material according to an embodiment of the present invention.

[0010] Figure 4 FIG. 4 is a schematic diagram showing a curved bamboo-wood composite material according to another embodiment of the present invention. DETAILED DESCRIPTION

[0011] Embodiments according to the present invention will be described below with reference to the accompanying drawings. In the following description of the embodiments disclosed in this specification, when the detailed description of the known functions and configurations incorporated herein may make the subject matter of the embodiments disclosed in this specification quite unclear, these descriptions will be omitted. In addition, the accompanying drawings are provided only for a better understanding of the embodiments disclosed in this specification and are not intended to limit the technical ideas disclosed in this specification. Therefore, it should be understood that the accompanying drawings include all modifications, equivalents and alternatives within the scope and spirit of the present invention.

[0012] Unless otherwise defined, all terms including technical or scientific terms have the same meaning as those generally understood by ordinary technicians in the technical field to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as consistent with the contextual meaning of the relevant technology. Unless clearly defined in the present invention, these terms should not be interpreted as ideal or overly formal meanings.

[0013] As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0014] It will be further understood that the terms “including,” “comprising,” and / or “having” used herein specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

[0015] In addition, the size and thickness of each configuration shown in the drawings are arbitrarily shown for understanding and ease of description, but the present invention is not limited thereto, and the thickness of layers, films, panels, regions, etc. are exaggerated for clarity.

[0016] Figure 1 is a flow chart showing a method for processing a curved bamboo-wood composite material according to an embodiment of the present invention.

[0017] Reference Figure 1 The processing method of the arc-shaped bamboo slice and wood veneer composite material provided by the present invention (i.e., the processing method of the arc-shaped bamboo-wood composite material) may include the following steps: - Segment and grade the bamboo tubes into different outer diameters; - splitting the graded bamboo tube according to the circumference and length of the small end to obtain a plurality of arc-shaped bamboo pieces; - removing inner and outer bamboo nodes from the arc-shaped bamboo pieces, subjecting the arc-shaped bamboo pieces to heat treatment, and subjecting the arc-shaped bamboo pieces to arc expansion treatment to enlarge the inner and outer arc radii to obtain arc-modified bamboo pieces; - drying and shaping the curved bamboo pieces to obtain curved bamboo pieces; - Classifying the arc-fixing bamboo pieces according to the length of the outer arc chord to obtain arc-adjusting bamboo pieces; and - Applying glue on both sides of the wood veneer, and pressing the arc-adjusting bamboo strips and the wood veneer blanks.

[0018] Specifically, according to an embodiment of the present invention, when manufacturing curved bamboo-wood composite materials, the selection of bamboo is crucial. Different types of bamboo have different growth habits and physical properties, so it is also important to select bamboo species suitable for manufacturing curved bamboo pieces. For example, moso bamboo is often used to make curved bamboo pieces because of its tall, thick wall, and long internodes.

[0019] Furthermore, select bamboo with good growth and tough texture as raw material. Make sure the bamboo has no cracks, no insects, and has uniform diameter.

[0020] Furthermore, use a professional circular saw blade assembly or similar cutting tools to ensure that the cut surface is flat and burr-free. Measure the outer diameter of the bamboo tube and establish a grading standard for the outer diameter size. For example, bamboo tubes can be divided into different grades such as small diameter, medium diameter and large diameter. Classify each bamboo tube into the corresponding grade according to its outer diameter data.

[0021] Furthermore, in the processing of bamboo products (such as furniture, handicrafts, etc.), the moisture content of bamboo pieces is crucial to the quality and stability of the products. Too high a moisture content may cause the bamboo pieces to deform and crack during processing, and even affect the service life of the product.

[0022] In the embodiment, the selected bamboo tubes are cut and graded, and the graded bamboo tubes are split into at least two parts.

[0023] In addition, the inner and outer bamboo nodes are removed from the split curved bamboo pieces, and the bamboo pieces are further processed and treated, such as grinding and polishing, to improve their quality and aesthetics.

[0024] Furthermore, the curved bamboo pieces after steam softening are easier to be processed and handled in the future. During the steam softening treatment, the treatment temperature and time should be strictly controlled to avoid over-softening or under-softening.

[0025] Furthermore, the softened bamboo piece is placed in the arc expansion mold to ensure that the bamboo piece fits tightly with the mold. Appropriate pressure or deformation force is applied to the mold to gradually deform the bamboo piece to the required arc. During the arc expansion process, the deformation of the bamboo piece should be closely monitored to avoid excessive deformation or cracking.

[0026] In addition, in some cases, bamboo pieces may deform during processing or use due to stress concentration or external factors. Arc expansion can disperse these stresses and improve the overall stability and durability of the bamboo pieces.

[0027] Furthermore, after the arc expansion is completed, the obtained arc-modified bamboo piece is taken out from the mold and subjected to necessary shaping treatment to fix its deformed shape.

[0028] Furthermore, after the curved bamboo strips are dried and shaped, they are once again classified and graded to improve the utilization rate of the bamboo and the uniformity of the product.

[0029] Furthermore, by accurately measuring and grading the length of the outer arc chord, the arc-shaped bamboo pieces can be divided into different grades more finely, so that each piece of bamboo can be fully utilized, thus avoiding the waste of bamboo pieces due to size mismatch and improving the overall utilization rate of bamboo materials.

[0030] Furthermore, curved bamboo pieces of the same grade are closer in size and shape, which helps to improve the uniformity and overall quality of the final product. Curved bamboo pieces of different grades can meet the needs of different customers or products, making the products more diversified and more competitive in the market.

[0031] Furthermore, in the subsequent processing, since the arc-shaped bamboo pieces have been graded according to the length of the outer arc chord, they can be cut, polished, etc. more conveniently, simplifying the production process.

[0032] Furthermore, the curved bamboo strips after the arc treatment can indeed undergo a series of processing steps in terms of technology to enhance their durability and aesthetics, and then be glued with wood veneer to form a composite material.

[0033] According to the embodiment of the present invention, the curved bamboo strips can be carbonized, treated with antiseptic and mildew-proof treatments, and then assembled and glued with wood veneers to form the material.

[0034] Furthermore, carbonization is a process of treating bamboo pieces at high temperatures, which aims to improve the dimensional stability and weather resistance of bamboo pieces while giving them a unique color and texture. Carbonized bamboo pieces are more stable and less prone to deformation and cracking.

[0035] Furthermore, the antiseptic treatment is to prevent the bamboo strips from being corroded by microorganisms (such as fungi, bacteria, etc.) during use, thereby extending their service life. Common antiseptic methods include soaking in antiseptics, spraying antiseptic coatings, etc. These antiseptics are generally low-toxic and environmentally friendly, and are harmless to the human body and the environment.

[0036] Furthermore, anti-mold treatment is similar to anti-corrosion treatment, but focuses more on preventing the growth of mold. Mold not only affects the aesthetics of the bamboo strips, but may also damage their structure. Therefore, it is very important to carry out anti-mold treatment during the processing of bamboo strips.

[0037] Furthermore, the composite material obtained by assembling and gluing the curved bamboo strips that have been carbonized, anti-corrosive and anti-mildew treated with wood veneers not only has the respective advantages of bamboo strips and wood veneers, such as the hardness and wear resistance of bamboo strips, the texture and aesthetics of wood veneers, but also has good overall performance and stability.

[0038] Furthermore, the wood veneer is double-sidedly glued, usually with environmentally friendly, high-strength adhesives such as phenolic resin, polyurethane glue, urea-formaldehyde resin glue, etc. Gluing is a key step in wood processing and composite material manufacturing, which has an important impact on the performance of the final product. The amount of glue applied will affect the bonding strength and the cost of the final product. Too little glue may result in insufficient bonding strength, while too much glue will increase costs and may affect other properties of the product. Therefore, it is necessary to select an appropriate amount of glue according to the actual situation.

[0039] On the other hand, sizing can improve the overall properties of wood veneer, such as water resistance, heat resistance and electrical insulation.

[0040] Furthermore, the arc-adjusting bamboo pieces are arranged and combined according to the design requirements to ensure the consistency of the curvature and size.

[0041] Further, the glue-coated wood veneer is covered on the arranged bamboo pieces, and the assembly is fixed together using a clamp or a pressing plate to prevent displacement or deformation during the pressing process.

[0042] Further, the assembly is placed in a hot press or a cold press for pressing. After the pressing is completed, the composite material is taken out and placed in a ventilated and dry place for curing to ensure that the adhesive is completely cured and achieves the best bonding effect.

[0043] Figure 2 Schematic diagram showing a method for processing a curved bamboo-wood composite material according to an embodiment of the present invention.

[0044] According to one aspect of the present invention, referring to Figure 2 The arc-shaped bamboo-wood composite material processing method provided by the present invention may include the following steps: (1) round bamboo grading: cutting the newly cut round bamboo into sections, and grading the outer diameter of the bamboo tube after slicing; (2) round bamboo splitting: splitting the graded bamboo tube into at least 2 parts according to the circumference of the small head and the size of the required arc-shaped bamboo piece; (3) softening and arc-changing: removing the inner and outer bamboo nodes of the arc-shaped bamboo piece after splitting, and expanding the inner and outer arc radii of the arc-shaped bamboo piece by sampling arc-expanding device after heat treatment. The heat treatment method includes but is not limited to: steam, drying, boiling, microwave, high frequency and other methods; (4) drying and shaping: drying and shaping the arc-shaped bamboo piece after arc-changing, or placing it in a drying and shaping device for fixing and drying. (5) Secondary grading: The curved bamboo strips after arc setting are graded according to the length of the outer arc chord, and the grading gradient is set to 5 mm; (6) Gluing: Glue is applied on both sides of the wood veneer, and no glue is applied to the curved bamboo strips; (7) Assembly and gluing: The curved bamboo strips after arc adjustment are assembled and glued with the wood veneer to form the material.

[0045] According to an embodiment of the present invention, the outer diameter of the bamboo tube is 120 mm, and the bamboo tube is divided into four parts, and the moisture content of the bamboo pieces is about 85%.

[0046] According to an embodiment of the present invention, in the heat treatment of the curved bamboo strips, the curved bamboo strips are softened with steam at 180° C. for 8 minutes.

[0047] According to an embodiment of the present invention, a node removal and arc expansion integrated machine is used to remove the inner and outer nodes of the softened bamboo piece, and the bamboo piece is subjected to an arc expansion process.

[0048] According to an embodiment of the present invention, the arc-expanded bamboo slices are fixed in a drying and shaping mold, and placed in a drying kiln to be dried until the moisture content is within 10%.

[0049] According to the embodiment of the present invention, the curved bamboo pieces after drying and shaping are graded according to the length of the outer arc chord, and the grade gradient is set to 5 mm. More refined grading allows the curved bamboo pieces to be applied to more fields, which has the advantages of improving material utilization, improving product quality, optimizing production processes, promoting technological innovation and research and development, and bringing significant economic and social benefits.

[0050] According to an embodiment of the present invention, the wood veneer is double-sided glued, the glue type is phenolic resin, and the glue amount is 150-200 g / m 2 , the curved bamboo strips are not glued.

[0051] According to an embodiment of the present invention, the arc-adjusting bamboo strips and the wood veneer are glued together using a hot-pressing temperature of 145° C. and a gluing pressure of 1.8 MPa.

[0052] According to one aspect of the present invention, a curved bamboo-wood composite material is provided, which may include a curved bamboo-wood composite material produced by the method for processing a curved bamboo-wood composite material according to the present invention.

[0053] According to an embodiment of the present invention, the wood veneer is a 1.5 mm thick fast-growing poplar veneer.

[0054] According to another embodiment of the present invention, referring to Figure 2 The arc-shaped bamboo-wood composite material processing method provided by the present invention may include the following steps: (1) round bamboo grading: cutting the newly cut round bamboo into sections, and grading the outer diameter of the bamboo tube after slicing; (2) round bamboo splitting: splitting the graded bamboo tube into at least 2 parts according to the circumference of the small head and the size of the required arc-shaped bamboo piece; (3) softening and arc-changing: removing the inner and outer bamboo nodes of the arc-shaped bamboo piece after splitting, and expanding the inner and outer arc radii of the arc-shaped bamboo piece by sampling arc-expanding device after heat treatment. The heat treatment method includes but is not limited to: steam, drying, boiling, microwave, high frequency and other methods; (4) drying and shaping: drying and shaping the arc-shaped bamboo piece after arc-changing, or placing it in a drying and shaping device for fixing and drying. (5) Secondary grading: The curved bamboo strips after arc setting are graded according to the length of the outer arc chord, and the grading gradient is set to 5 mm; (6) Gluing: Glue is applied on both sides of the wood veneer, and no glue is applied to the curved bamboo strips; (7) Assembly and gluing: The curved bamboo strips after arc adjustment are assembled and glued with the wood veneer to form the material.

[0055] According to an embodiment of the present invention, the outer diameter of the bamboo tube is 110 mm, and the bamboo tube is divided into four parts, and the moisture content of the bamboo pieces is about 35%.

[0056] According to an embodiment of the present invention, during the drying and shaping of the modified-arc bamboo pieces, an initial pressure value of 0.05 MPa is applied, and the drying temperature is set to 140° C., and the drying is performed for about 2.5 h.

[0057] According to an embodiment of the present invention, in the grading of the modified arc bamboo pieces, the grading gradient is 5 mm.

[0058] According to an embodiment of the present invention, the arc-adjusting bamboo strips and the wood veneer are glued together using a hot-pressing temperature of 145° C. and a gluing pressure of 1.8 MPa.

[0059] According to one aspect of the present invention, a curved bamboo-wood composite material is provided, which may include a curved bamboo-wood composite material produced by the method for processing a curved bamboo-wood composite material according to the present invention.

[0060] According to an embodiment of the present invention, the wood veneer is a 1.5 mm thick fast-growing poplar veneer.

[0061] The arc-shaped bamboo-wood composite material processing method of the present invention and the arc-shaped bamboo-wood composite material obtained by the arc-shaped bamboo-wood composite material processing method of the present invention will be specifically described below. Specific embodiment 1 like Figure 2 As shown, a method for processing arc-shaped bamboo-wood composite materials may include (1) round bamboo grading: cutting newly felled round bamboo into sections, and grading the outer diameter of the bamboo tube after slicing; (2) round bamboo splitting: splitting the graded bamboo tube into at least two parts according to the circumference of the small end and the size of the required arc-shaped bamboo piece; (3) softening and arc-changing: removing the inner and outer bamboo nodes of the split arc-shaped bamboo piece, and expanding the inner and outer arc radii of the arc-shaped bamboo piece by sampling arc-expanding device after heat treatment. The heat treatment method includes but is not limited to: steam, drying, boiling, microwave, high frequency and other methods; (4) drying and shaping: drying and shaping the arc-shaped bamboo piece after arc-changing, or placing it in a drying and shaping device for fixing and drying. (5) Secondary grading: The curved bamboo strips after arc setting are graded according to the length of the outer arc chord, and the grading gradient is set to 5 mm; (6) Gluing: Glue is applied on both sides of the wood veneer, and no glue is applied to the curved bamboo strips; (7) Assembly and gluing: The curved bamboo strips after arc adjustment are assembled and glued with the wood veneer to form the material.

[0063] The present invention also discloses an arc-shaped bamboo-wood composite material, including an arc-shaped bamboo-wood composite material obtained by the arc-shaped bamboo-wood composite material processing method, such as Figure 3 shown.

[0064] The method for preparing the curved bamboo-wood composite material may include the following steps: (1) Segmentation: Fresh bamboo was cut into sections; (2) Splitting: A fresh bamboo tube with a length of 1.2 m and an outer diameter of 120 mm was selected and split into four parts; the moisture content of the bamboo slices was measured to be about 85%; (3) Softening: The bamboo slices were softened with steam at 180 °C for 8 min; (4) Arc expansion: The softened bamboo slices were subjected to an arc expansion machine to remove the inner and outer nodes of the bamboo slices and then arc expanded; (5) Drying and shaping: The arc expanded bamboo slices were fixed in a drying and shaping mold and placed in a drying kiln to dry until the moisture content was less than 10%; (6) Classification: The arc-shaped bamboo slices after drying and shaping were graded according to the outer arc chord length, and the grading gradient was set to 5 mm; (7) Gluing: The wood veneer was double-sided glued with phenolic resin and the glue amount was 150-200 g / m 2 , no gluing is applied to the curved bamboo strips; (8) Gluing the strips together: The curved bamboo strips after arc adjustment are assembled with 1.5 mm thick fast-growing poplar veneer, and the strips are glued together at a hot pressing temperature of 145 °C and a gluing pressure of 1.8 MPa. Specific embodiment 2 like Figure 2 As shown, a method for processing arc-shaped bamboo-wood composite materials may include (1) round bamboo grading: cutting newly felled round bamboo into sections, and grading the outer diameter of the bamboo tube after slicing; (2) round bamboo splitting: splitting the graded bamboo tube into at least two parts according to the circumference of the small end and the size of the required arc-shaped bamboo piece; (3) softening and arc-changing: removing the inner and outer bamboo nodes of the split arc-shaped bamboo piece, and expanding the inner and outer arc radii of the arc-shaped bamboo piece by sampling arc-expanding device after heat treatment. The heat treatment method includes but is not limited to: steam, drying, boiling, microwave, high frequency and other methods; (4) drying and shaping: drying and shaping the arc-shaped bamboo piece after arc-changing, or placing it in a drying and shaping device for fixing and drying. (5) Secondary grading: The curved bamboo strips after arc setting are graded according to the length of the outer arc chord, and the grading gradient is set to 5 mm; (6) Gluing: Glue is applied on both sides of the wood veneer, and no glue is applied to the curved bamboo strips; (7) Assembly and gluing: The curved bamboo strips after arc adjustment are assembled and glued with the wood veneer to form the material.

[0066] The present invention also discloses an arc-shaped bamboo-wood composite material, including an arc-shaped bamboo-wood composite material obtained by the arc-shaped bamboo-wood composite material processing method, such as Figure 4 shown.

[0067] The method for preparing the curved bamboo-wood composite material may include the following steps: (1) Segmentation: Cut fresh bamboo into sections; (2) Splitting: Select a bamboo tube with a length of 1.2 m and an outer diameter of 110 mm and split it into four parts; the moisture content of the bamboo slices was measured to be about 35%; (3) De-knotting: Remove the inner and outer nodes of the arc-shaped bamboo slices after splitting through an angle grinder; (4) Arc expansion: Place the arc-shaped bamboo slices after de-knotting in a drying arc-fixing device and fix them. Apply an initial pressure of 0.05 MPa to the bamboo slices through the arc-fixing device. Place the bamboo slices and the device together in a drying kiln. Set the drying temperature to 140 °C. After drying for about 2.5 h, remove the bamboo slices; (6) Classification: Classify the arc-shaped bamboo slices after drying according to the outer arc chord length. The grading gradient is set to 5 mm; (7) Gluing: Glue the wood veneer on both sides. The glue type is phenolic resin and the glue amount is 150-200 g / m 2 , no gluing is applied to the curved bamboo strips; (8) Gluing the strips together: The curved bamboo strips after arc adjustment are assembled with 1.5 mm thick fast-growing poplar veneer, and the strips are glued together at a hot pressing temperature of 145 °C and a gluing pressure of 1.8 MPa.

[0068] Through the above processing method, a curved bamboo-wood composite material (see Figure 3 and 4 ), effectively improve the utilization rate of bamboo, maintain the original gradient structure and surface texture characteristics of bamboo, and reduce the generation of waste and dust in the processing process.

[0069] In summary, in view of the shortcomings of low bamboo utilization rate and serious shape fragmentation in the processing of existing bamboo engineering materials, the present invention proposes a processing method for preparing arc-shaped bamboo-wood composite engineering materials. The method can significantly improve the utilization rate of bamboo and greatly expand the use space of bamboo.

[0070] Although the present teaching has been described with respect to specific embodiments, it is obvious to those skilled in the art that, according to the present disclosure, various changes and modifications may be made without departing from the spirit and scope of the present disclosure as defined in the appended claims. In addition, the 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 segmented and graded into outer diameter sizes; Splitting the graded bamboo tube according to the circumference and length of the small end to obtain a plurality of arc-shaped bamboo pieces; The arc-shaped bamboo pieces are subjected to heat treatment after removing inner and outer bamboo nodes, and arc-expanding treatment is performed on the arc-shaped bamboo pieces after heat treatment to enlarge the inner and outer arc radii, so as to obtain arc-modified bamboo pieces; Drying and shaping the curved bamboo pieces to obtain curved bamboo pieces; The arc-fixing bamboo pieces are graded according to the length of the outer arc chord to obtain arc-adjusting bamboo pieces; as well as Gluing is applied on both sides of the wood veneer, and the arc-adjusting bamboo pieces and the wood veneer are assembled and pressed.

2. The method for processing curved bamboo-wood composite materials according to claim 1, characterized in that: The outer diameter of the bamboo tube is 120 mm. It is divided into 4 parts, and the moisture content of the bamboo strips is about 85%.

3. The method for processing curved bamboo-wood composite materials according to claim 1, characterized in that: The outer diameter of the bamboo tube is 110 mm. It is divided into 4 parts, and the moisture content of the bamboo strips is about 35%.

4. The method for processing curved bamboo-wood composite materials according to claim 2, characterized in that: In the heat treatment of the curved bamboo pieces, the curved bamboo pieces are softened with steam at 180° C. for 8 minutes.

5. The method for processing curved bamboo-wood composite material according to claim 2, characterized in that: The modified bamboo slices are dried to a moisture content of less than 10%.

6. The method for processing curved bamboo-wood composite material according to claim 3, characterized in that: During the drying and shaping of the modified bamboo strips, an initial pressure value of 0.05 MPa was applied, and the drying temperature was set at 140° C., and the drying was performed for about 2.5 h.

7. The method for processing curved bamboo-wood composite material according to claim 1, characterized in that: In the grading of the modified arc bamboo pieces, the grading gradient is 5 mm.

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

9. A curved bamboo-wood composite material, characterized in that: The invention comprises a curved bamboo-wood composite material obtained by the curved bamboo-wood composite material processing method according to any one of claims 1 to 8.

10. The curved bamboo-wood composite material according to claim 9, characterized in that: The wood veneer is a 1.5 mm thick fast-growing poplar veneer.

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