Bamboo product treatment method

Abstract

The invention discloses a bamboo product treatment method. The bamboo product treatment method comprises the steps of S1, S3, S5 and S7. The method comprises the following steps: S1, mixing fine bamboo powder and plastic powder according to a preset proportion to form mixed filler powder; s3, coarse bamboo powder is pre-filled in cracks and / or recesses in the surface of the bamboo product base material to be treated to form a middle base material; s5, the mixed filler powder is scattered on the surface of the middle base material; and S7, the bamboo product is cooled after being hot-pressed. Therefore, the mixed filler powder is spread on the surface of the bamboo product base material, and then hot pressing and cooling are performed, so that the wear-resistant layer is formed on the surface of the bamboo product and the defects on the surface of the bamboo product are repaired, the process is simple, the bamboo product processing time is short, the processing efficiency is high, and the cost of a finished product is low.

Description

Technical Field

[0001] The present invention relates to the field of bamboo material processing, and more particularly to a method for processing bamboo products. Background Art

[0002] Bamboo is widely used in furniture and decoration due to its natural and environmentally friendly properties and beautiful texture. However, its surface is prone to defects such as cracks and dents.

[0003] Traditional treatment methods often use liquid adhesives (such as urea-formaldehyde resin or phenolic resin) mixed with bamboo powder and then scraped on, which requires an additional drying step. This makes the bamboo treatment cycle long and costly.

[0004] To this end, the present invention provides a method for treating bamboo products to at least partially solve the above problems. Summary of the Invention

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Specific Examples section. The Summary of the Invention section of this application is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above technical problems, the present application provides a method for processing bamboo products, which comprises:

[0007] Step S1, mixing fine bamboo powder and plastic powder according to a preset ratio to form mixed filler powder;

[0008] Step S3: pre-filling coarse bamboo powder into cracks and / or depressions on the surface of the bamboo product substrate to be processed to form an intermediate substrate;

[0009] Step S5: Spreading the mixed filler powder on the surface of the intermediate substrate;

[0010] Step S7: hot-pressing the bamboo product and then cooling the bamboo product.

[0011] According to the bamboo product processing method of the present application, mixed filler powder is sprinkled on the surface of the bamboo product substrate, and then hot pressed and cooled to form a wear-resistant layer on the surface of the bamboo product and repair defects on the surface of the bamboo product. The process is simple, the time for processing bamboo products is short, the processing efficiency is high, and the cost of the finished product is low; in addition, coarse bamboo powder is pre-filled in the cracks and / or depressions on the surface of the bamboo product substrate to be processed to form an intermediate substrate, which can reduce the use of mixed filler powder and further reduce costs.

[0012] Optionally, the preset ratio range is 7:3≤fine bamboo powder:plastic powder≤8:2.

[0013] Optionally, the proportion of plastic powder in the mixed filler powder is ≥20%.

[0014] Optionally, the particle size of the fine bamboo powder is ≤150 μm.

[0015] Optionally, the sieve particle size of the fine bamboo powder is in the range of 80 mesh ≤ 100 mesh, and / or

[0016] The moisture content of fine bamboo powder is ≤5%.

[0017] Optionally, the sieve particle size of the plastic powder is ≤200 mesh.

[0018] Optionally, in step S3, the crude bamboo powder is pre-filled with a scraper. Before the pre-filling of the crude bamboo powder in step S3, step S3 further includes:

[0019] The surface of the bamboo product substrate to be treated is dusted.

[0020] Optionally, the range of the flatness of the surface of the intermediate substrate after step S3 is −0.5 mm ≤ the flatness of the surface of the intermediate substrate ≤ +0.5 mm.

[0021] Optionally, step S5 includes:

[0022] Use a sieve or powder hopper to evenly spread the mixed filler powder on the surface of the intermediate substrate and use a scraper to level it.

[0023] Optionally, the mixed filler powder is spread on the surface of the intermediate substrate to a thickness ranging from 0.5 mm to 1 mm.

[0024] Optionally, in step S7,

[0025] The range of hot pressing temperature is 130℃≤hot pressing temperature≤140℃;

[0026] The range of hot pressing pressure is 1.5MPa≤hot pressing pressure≤2.5MPa;

[0027] The range of hot pressing time is 8 minutes ≤ hot pressing time ≤ 10 minutes.

[0028] Optionally, in step S7, the bamboo product is naturally cooled to room temperature after hot pressing, and / or

[0029] The plastic powder is phenolic resin powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to make the advantages of the present application more easily understood, the present application briefly described above will be described in more detail with reference to specific embodiments shown in the accompanying drawings. It will be understood that these drawings depict only typical embodiments of the present application and are therefore not to be considered as limiting the scope of protection thereof. The accompanying drawings describe and explain the present application with additional specificity and detail.

[0031] Figure 1 The figure is a schematic flow chart of a method for processing bamboo products according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0032] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, some technical features well known in the art are not described to avoid confusion with the present application embodiments.

[0033] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0034] In this document, ordinal numbers such as “first” and “second” cited in this application are merely identifiers and do not include any other meanings, such as a specific order, etc.

[0035] To thoroughly understand the embodiments of the present application, a detailed structure will be provided in the following description. Obviously, the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail below, but in addition to these detailed descriptions, the present application may also include other embodiments.

[0036] This application provides a method for treating bamboo products. This method can repair surface defects on bamboo products and form a wear-resistant layer on the surface of bamboo products. Processing bamboo products using this method can improve production efficiency and reduce costs. The bamboo products can be bamboo materials. The bamboo materials can be bamboo slices, bamboo boards, or bamboo strips formed by simple cutting of raw bamboo. The bamboo products can also be finished products formed by processing raw bamboo.

[0037] Please refer to Figure 1 The bamboo product processing method includes step S1, step S3, step S5 and step S7.

[0038] Step S1: mixing fine bamboo powder and plastic powder in a preset ratio to form mixed filler powder.

[0039] Fine bamboo powder and plastic powder are added together in a preset weight ratio according to a preset proportion, and then mixed to form a mixed filler powder. The plastic powder contains a curing agent.

[0040] Furthermore, fine bamboo powder and plastic powder are added to a blender at a preset weight ratio. The blender's stirring shaft rotates at a low speed (200-300 rpm) to blend the fine bamboo powder and plastic powder for 10-15 minutes to form a mixed filler powder. After blending, the mixed filler powder is uniform and free of lumps. This ensures a uniform blend of the fine bamboo powder and plastic powder.

[0041] It is understood that in embodiments not shown, the fine bamboo powder and the plastic powder may be stirred and mixed in other ways, such as by manual stirring.

[0042] Step S3: pre-filling coarse bamboo powder into cracks and / or depressions on the surface of the bamboo product substrate to be processed to form an intermediate substrate.

[0043] The surface of the bamboo product substrate to be treated may have defects such as cracks and / or depressions. Before filling the mixed filler powder, coarse bamboo powder is pre-filled into the cracks and / or depressions on the surface of the bamboo product substrate to be treated to form an intermediate base material. The particle size of the coarse bamboo powder is larger than that of the fine bamboo powder. This can reduce the amount of mixed filler powder used.

[0044] Step S5: Sprinkle the mixed filler powder on the surface of the intermediate substrate.

[0045] Step S7: hot-pressing the bamboo product and then cooling the bamboo product.

[0046] The mixed filler powder is spread on the surface of the intermediate substrate, and then the intermediate substrate with the mixed filler powder is hot pressed by a hot pressing process. In this way, the plastic powder is hot-melted and combined with the bamboo powder to form a protective layer attached to the surface of the intermediate substrate.

[0047] The intermediate substrate (hot-pressed bamboo product) with the mixed filler powder attached is then cooled after hot pressing. This allows the protective layer formed by the mixed filler powder to condense and form a wear-resistant layer. This shortens the processing time of the bamboo product, improves processing efficiency, and reduces the cost of the finished product.

[0048] In this embodiment, by spreading mixed filler powder on the surface of the bamboo product substrate, and then performing hot pressing and cooling, a wear-resistant layer is formed on the surface of the bamboo product and defects on the surface of the bamboo product are repaired. The process is simple, the time for processing the bamboo product is short, the processing efficiency is high, and the cost of the finished product is low. In addition, coarse bamboo powder is pre-filled in the cracks and / or depressions on the surface of the bamboo product substrate to be processed to form an intermediate substrate, which can reduce the use of mixed filler powder and further reduce costs.

[0049] Optionally, the particle size of the fine bamboo powder is ≤150 μm. This avoids unevenness on the surface of the processed bamboo product caused by large bamboo powder particle size, makes the surface of the processed bamboo product smoother, and improves the flatness of the surface of the processed bamboo product.

[0050] Optionally, the moisture content of the fine bamboo powder is ≤5%, thereby making the bamboo powder adhere more firmly to the surface of the bamboo product.

[0051] Furthermore, the sieved particle size of the fine bamboo powder is in the range of 80 mesh ≤ 100 mesh. The treatment method can remove larger particles by screening (e.g., filtering through a 100-mesh sieve). This further smoothens the surface of the processed bamboo product, thereby further improving the surface flatness of the processed bamboo product.

[0052] As used herein, the sieve size is the size of the mesh openings through which particles can pass, expressed as the number of mesh openings within a 1-inch width sieve.

[0053] Optionally, the sieve particle size of the plastic powder is ≤200 meshes. Thus, the mixed filler powder can be more firmly attached to the surface of the bamboo product.

[0054] Optionally, the plastic powder is phenolic resin powder. Thus, the surface wear resistance of the processed bamboo product is better.

[0055] Optionally, the preset ratio range is 7:3≤fine bamboo powder:plastic powder≤8:2. Thus, after the protective layer is cured, a continuous plastic film is formed to wrap the bamboo powder particles, thereby improving wear resistance.

[0056] Furthermore, the preset ratio is fine bamboo powder: plastic powder = 7.5:2.5, thereby further improving wear resistance.

[0057] Optionally, the proportion of plastic powder in the mixed filler powder is ≥20%. In other words, the ratio of the weight of the plastic powder in the mixed filler powder to the total weight of the mixed filler powder is ≥20%. This further improves wear resistance.

[0058] Optionally, step S3 uses a scraper to pre-fill the coarse bamboo powder to form an intermediate substrate. This allows for rapid pre-filling of the coarse bamboo powder. Furthermore, the process is simple and does not require complex equipment.

[0059] Before pre-filling the crude bamboo powder in step S3, step S3 also includes removing dust (e.g., cleaning) from the surface of the bamboo product substrate to be processed. Thus, the crude bamboo powder and the mixed filler powder can be more firmly attached to the surface of the bamboo product substrate.

[0060] Furthermore, the surface flatness of the intermediate substrate after step S3 is within a range of -0.5 mm ≤ intermediate substrate surface flatness ≤ +0.5 mm. This results in a smoother outer surface of the wear-resistant layer formed in subsequent steps S5 and S7. Furthermore, the smoothness range of -0.5 mm ≤ intermediate substrate surface flatness ≤ +0.5 mm ensures that the mixed filler powder adheres more firmly to the outer surface of the intermediate substrate in step S5.

[0061] Optionally, step S5 includes: using a screen or a powder hopper to evenly spread the mixed filler powder on the surface of the intermediate substrate, and using a scraper to level it.

[0062] In step S5, a spreading tool (a screen or a powder hopper) is used to spread the mixed filler powder, which can spread the mixed filler powder more evenly and ensure that the thickness of the mixed filler powder spread on the intermediate substrate is uniform. In this way, the surface smoothness of the processed bamboo product can be improved.

[0063] Specifically, the spreading tool may be made to reciprocate at a uniform speed above the intermediate substrate, so that the mixed filler powder dropped from the spreading tool is evenly spread on the surface of the intermediate substrate.

[0064] After spreading the mixed filler powder, the mixed filler powder is scraped and leveled with a scraper, so that the thickness of the mixed filler powder spread on the intermediate substrate can be further made uniform, thereby further improving the flatness of the surface of the processed bamboo product.

[0065] Furthermore, the thickness of the mixed filler powder sprinkled on the surface of the intermediate substrate is in the range of 0.5 mm ≤ thickness ≤ 1 mm. Thus, the outer surface of the wear-resistant layer of the processed bamboo product is smoother.

[0066] Optionally, in step S7, during the step of hot pressing the bamboo product, the hot pressing temperature is in the range of 130° C. ≤ hot pressing temperature ≤ 140° C. Since the curing temperature of phenolic resin is 130° C. to 140° C., this can optimally cure the phenolic resin and prevent carbonization of the bamboo powder.

[0067] Optionally, in step S7, during the step of hot pressing the bamboo product, the hot pressing pressure is in the range of 1.5 MPa ≤ hot pressing pressure ≤ 2.5 MPa. Thus, sufficient pressure allows the mixed filler powder to be tightly bonded to the intermediate substrate, reducing interlayer peeling.

[0068] Optionally, in step S7, in the step of hot pressing the bamboo product, the hot pressing time is in the range of 8 minutes ≤ hot pressing time ≤ 10 minutes. Thus, it is ensured that the plastic powder is completely melted, thereby firmly bonding with the bamboo powder and the base material.

[0069] Optionally, in step S7, the bamboo product is naturally cooled to room temperature after hot pressing, and then demoulding. After demoulding, the demoulded bamboo product is rubbed with 240-mesh sandpaper or light sand to remove burrs.

[0070] Optionally, the uncured mixed filler powder (dry material that has not come into contact with the glue) can be collected and reused.

[0071] The surface roughness of the finished bamboo product after processing is Ra≤1.6μm.

[0072] After processing, the finished bamboo products are tested on an abrasion-resistant testing machine. The abrasion-resistant testing machine presses the surface of the finished bamboo products with a predetermined pressure and rotates the abrasive tool at a predetermined speed for 500 revolutions. If the bamboo base material is not exposed, the product passes the test; otherwise, it fails.

[0073] The present application has been described through the above-described embodiments, but it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present application to the described embodiments. In addition, it will be understood by those skilled in the art that the present application is not limited to the above-described embodiments, and that various variations and modifications may be made based on the teachings of the present application, all of which fall within the scope of protection claimed in the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

[0074] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the technical field of this application. The terms used herein are only for describing specific implementation purposes and are not intended to limit this application. Terms such as "component" and the like appearing herein may refer to either a single part or a combination of multiple parts. Terms such as "installation" and "setting" appearing herein may refer to either a component being directly attached to another component or a component being attached to another component through an intermediary. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise stated.

Claims

1. A method for processing bamboo products, characterized in that: The processing method of the bamboo product comprises: Step S1, mixing fine bamboo powder and plastic powder according to a preset ratio to form mixed filler powder; Step S3: pre-filling coarse bamboo powder into cracks and / or depressions on the surface of the bamboo product substrate to be processed to form an intermediate substrate; Step S5, spreading the mixed filler powder on the surface of the intermediate substrate; Step S7: hot-pressing the bamboo product and then cooling the bamboo product.

2. The method for processing bamboo products according to claim 1, characterized in that: The preset ratio range is 7:3≤fine bamboo powder:plastic powder≤8:

2.

3. The method for treating bamboo products according to claim 1, wherein: The proportion of the plastic powder in the mixed filler powder is ≥20%.

4. The method for treating bamboo products according to claim 1, wherein: The particle size of the fine bamboo powder is ≤150 μm.

5. The method for treating bamboo products according to claim 1, wherein: The sieve particle size of the fine bamboo powder is in the range of 80 mesh ≤ 100 mesh, and / or The moisture content of the fine bamboo powder is ≤5%.

6. The method for treating bamboo products according to claim 1, wherein: The sieve particle size of the plastic powder is ≤200 mesh.

7. The method for treating bamboo products according to claim 1, wherein: In step S3, the scraper is used to pre-fill the crude bamboo powder. Before the pre-filling of the crude bamboo powder in step S3, step S3 further includes: The surface of the bamboo product substrate to be treated is dusted.

8. The method for treating bamboo products according to claim 7, characterized in that: The range of the flatness of the surface of the intermediate substrate after step S3 is −0.5 mm ≤ the flatness of the surface of the intermediate substrate ≤ +0.5 mm.

9. The method for treating bamboo products according to claim 1, wherein: The step S5 comprises: The mixed filler powder is evenly spread on the surface of the intermediate substrate using a sieve or a powder hopper, and then leveled using a scraper.

10. The method for treating bamboo products according to claim 9, characterized in that: The mixed filler powder is sprinkled on the surface of the intermediate substrate to a thickness ranging from 0.5 mm to 1 mm.

11. The method for treating bamboo products according to claim 1, wherein: In the step S7, The range of hot pressing temperature is 130℃≤hot pressing temperature≤140℃; The range of hot pressing pressure is 1.5MPa≤hot pressing pressure≤2.5MPa; The range of hot pressing time is 8 minutes ≤ hot pressing time ≤ 10 minutes.

12. The method for treating bamboo products according to claim 1, characterized in that: In step S7, the bamboo product is hot-pressed and then naturally cooled to room temperature, and / or The plastic powder is phenolic resin powder.

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