Method for manufacturing a bamboo board

Abstract

The application provides a bamboo plate manufacturing method, which comprises the following steps: S1, bamboo sheet processing; S2, soaking: the bamboo sheet is soaked in a sodium silicate aqueous solution with a temperature of 125-135 DEG C for 24-72 h; S3, solidification: the soaked bamboo sheet is drained of water, and is solidified by microwave heating with a power of 500-2000 W for 2-10 min; S4, hot-pressing forming: hot-pressing is carried out by adopting main pressure of 10-12 MPa, side pressure of 7-8 MPa, and controlling temperature of 110-160 DEG C to keep for 190-300 s; S5, drying: the cooled bamboo plate blank is dried by microwave with a power of 300-800 W; and S6, cutting forming. The bamboo plate is soaked in sodium silicate, and is treated by microwave solidification, hot-pressing and microwave drying, so that the internal structure of the bamboo plate is strengthened, the structure of the bamboo plate is more uniform and dense after being filled and solidified by sodium silicate, the structural strength of the bamboo plate is improved, and the durability is good; after the solidification of sodium silicate, surface condensation water drops can be avoided, and a veneer is arranged on the surface of the bamboo plate, so that the waterproofness and durability of the bamboo plate are further improved, and the cracking of the bamboo plate is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bamboo template production, in particular to a bamboo plate manufacturing method. BACKGROUND

[0002] Plates are essential in life and industrial production, especially in the application of home and decoration environment. The existing plates include solid wood plates and particle boards, which are made by gluing and hot pressing, and have advantages and disadvantages. Bamboo plates are also used as decoration materials, which are an environmentally friendly material. However, the existing bamboo plates are made by gluing and pressing, and have insufficient structural strength, are easy to absorb water and crack, and have a hydrophobic layer on the surface for use in home decoration wallboards in the south, which is easy to appear water droplets in the rainy season, affecting the living environment. SUMMARY

[0003] The present application aims to overcome the above-mentioned deficiencies in the prior art and provide a bamboo plate manufacturing method with high strength and good durability, which can avoid surface water droplets.

[0004] The technical solution of the present application is: a bamboo plate manufacturing method, comprising the following steps:

[0005] S1: bamboo piece processing: bamboo is made into bamboo pieces, and the bamboo green, bamboo yellow and burrs on the bamboo pieces are removed;

[0006] S2: soaking: the bamboo pieces are soaked in a sodium silicate aqueous solution with a temperature of 125-135℃ for 24-72h;

[0007] S3: curing: the soaked bamboo pieces are drained of water, and are heated and cured by microwave treatment with a power of 500-2000W for 2-10min;

[0008] S4: hot pressing: the cured bamboo pieces are stacked in order, and are hot pressed at a main pressure of 11-15Mpa, a side pressure of 7-8Mpa, and a temperature of 110-160℃ for 190-300s, and then cooled to room temperature to form a bamboo plate blank after gluing and hot pressing;

[0009] S5: drying: the cooled bamboo plate blank is dried by microwave with a power of 300-800W, and the drying temperature is controlled at 45-75℃;

[0010] S6: cutting and forming: the dried bamboo plate is cut to the required size, and the surface is polished to obtain the bamboo plate.

[0011] The method has the advantages that the bamboo chips are soaked in sodium silicate, the sodium silicate is fully infiltrated into the bamboo fibers of the bamboo chips, microwave heating is used for solidification, the sodium silicate is integrated with the fiber structure of the bamboo chips, the density of the bamboo chips is higher, the pores in the internal structure of the bamboo chips are filled, the structure of the bamboo is more solid and durable, the sodium silicate can also endow the bamboo with fireproof performance, the microwave technology is used for processing the bamboo, the structure of the bamboo is more uniform and dense, the strength is higher, and the waterproof performance and the corrosion resistance are improved, the bamboo chips are processed into a board through hot pressing by using high temperature and high pressure, the structure of the board is further more compact, the strength is higher, the water resistance is improved, the board is not easy to absorb water and crack, a dense hydrophobic layer is formed on the surface of the board through the hot pressing technology, water absorption and water droplets can be effectively prevented, some components in the bamboo can be physically or chemically reacted, the structure of the bamboo is more uniform, the strength is higher, and the problem of cracking of the bamboo board is solved.

[0012] Further, the primary pressing adopts three-stage pressurization, the first stage is pressurized to 5 Mpa at a pressurization speed of 0.1 Mpa / s and held for 20-30 s; the second stage is pressurized to 8 Mpa at a pressurization speed of 0.05 Mpa / s and held for 30-50 s; and the third stage is pressurized to 10-12 Mpa at a pressurization speed of 0.1 Mpa / s and held for 200-240 s.

[0013] Preferably, the first stage is pressurized to 5 Mpa at a pressurization speed of 0.1 Mpa / s and held for 25 s; the second stage is pressurized to 8 Mpa at a pressurization speed of 0.05 Mpa / s and held for 45 s; and the third stage is pressurized to 11 Mpa at a pressurization speed of 0.1 Mpa / s and held for 220 s. The first stage pressurization can extrude and discharge the excess sodium silicate and water in the bamboo chips, and can make the sodium silicate absorbed by the bamboo chips remain in the bamboo chips and fill the pores of the bamboo chips, so that the structure of the bamboo is more uniform and dense, then the second stage is used to press the bamboo chips, the bamboo chips are tightly bonded through gluing, and the outer surface of the bamboo chips is not affected by the sodium silicate solution and water discharged in the first stage, so that the gluing is firm, and the third stage is used for positioning and bonding of the bamboo chips to avoid the rebound of the bamboo board after hot pressing and affect the structure of the bamboo board.

[0014] Further, the concentration of the sodium silicate aqueous solution is 2-10 mol / L. Preferably, the concentration of the sodium silicate aqueous solution is 3-7 mol / L; more preferably, the concentration of the sodium silicate aqueous solution is 3 / 4 / 5 mol / L, so as to ensure that the bamboo chips can sufficiently absorb the sodium silicate aqueous solution, avoid that the viscosity of the aqueous solution is too large to affect the absorption of the sodium silicate by the bamboo chips, improve the release of organic substances in the bamboo chips, and avoid affecting the service life of the bamboo chips.

[0015] Further, in step S5, the drying time is 24-48h. Preferably, the drying time is 36-45h; more preferably, the drying time is 40 / 42 / 43h; conveniently ensuring the drying effect and the quality of the bamboo board.

[0016] Further, in step S4, the cooling is performed by air cooling, conveniently ensuring the quality of the bamboo board and avoiding deformation due to too fast cooling speed.

[0017] Further, the thickness of the bamboo sheet is 0.2-0.7cm, which can shorten the soaking time, shorten the absorption time of sodium silicate by the bamboo sheet, and improve the leaching rate of the organic matter inside the bamboo sheet,

[0018] Further, the thickness of the bamboo board is 1.5-4cm, ensuring the structural strength of the bamboo board.

[0019] Further, in step S3, the curing temperature is 150-198℃, improving the curing effect and ensuring that the sodium silicate on the surface of the bamboo sheet and the sodium silicate inside the bamboo sheet can be cured.

[0020] Further, after polishing and polishing, the upper and lower surfaces of the bamboo board are glued with a veneer, and hot pressing is performed at 5-10Mpa and a temperature of 90-98℃ for 180-280s. The veneer has the functions of hydrophobicity, fireproofness and fire resistance, further improving the waterproofness and durability of the bamboo board; preferably, hot pressing is performed at 6 / 7Mpa and a temperature of 94 / 95℃ for 200 / 260s, conveniently bonding the veneer with the bamboo board and avoiding gaps, further reducing the cracking of the bamboo board.

[0021] The present application has the following characteristics: the bamboo sheet is soaked in sodium silicate, and then treated by microwave curing, hot pressing and microwave drying, so that the internal structure of the bamboo board is strengthened, the sodium silicate is filled and cured, the structure of the bamboo board is more uniform and dense, and the structural strength of the bamboo board is improved and the durability is good. After the sodium silicate is cured, surface condensation water droplets can be avoided, and a veneer is arranged on the surface of the bamboo board, further improving the waterproofness and durability of the bamboo board and reducing the cracking of the bamboo board.

[0022] The detailed structure of the present application is further described below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 - is the processing flow chart of the bamboo board of the present application. DETAILED DESCRIPTION

[0024] Example 1

[0025] As shown in the drawings: a method for manufacturing a bamboo board, comprising the following steps:

[0026] S1 Bamboo piece processing: bamboo is made into bamboo pieces, and the green bamboo, yellow bamboo and burrs on the bamboo pieces are removed;

[0027] S2 soaking: the bamboo pieces are soaked in a sodium silicate aqueous solution with a temperature of 125-135℃ for 24-72h; the thickness of the bamboo pieces is 0.2-0.7cm, which can shorten the soaking time, shorten the absorption time of sodium silicate by the bamboo pieces, improve the leaching rate of organic matter inside the bamboo pieces, the thickness of the bamboo board is 1.5-4cm, which ensures the structural strength of the bamboo board; the concentration of the sodium silicate aqueous solution is 2-10mol / L. Preferably, the concentration of the sodium silicate aqueous solution is 3-7mol / L; more preferably, the concentration of the sodium silicate aqueous solution is 3 / 4 / 5mol / L, which can ensure that the bamboo pieces can sufficiently absorb the sodium silicate aqueous solution, while avoiding the viscosity of the aqueous solution being too large to affect the absorption of sodium silicate by the bamboo pieces, and also improving the release of organic matter inside the bamboo pieces, avoiding the influence on the service life of the bamboo pieces.

[0028] S3 solidification: the soaked bamboo pieces are drained of water, and are heated and solidified by microwave treatment with a power of 500-2000W for 2-10min; the solidification temperature is 150-198℃, which improves the solidification effect and ensures that the sodium silicate on the surface of the bamboo pieces and the sodium silicate inside the bamboo pieces can be solidified.

[0029] S4 hot pressing: the solidified bamboo pieces are stacked in order, and are hot pressed at a main pressure of 11-15Mpa, a side pressure of 7-8Mpa, and a temperature of 110-160℃ for 190-300s to form a bamboo board blank; the temperature is lowered to room temperature by air cooling, which can ensure the quality of the bamboo board and avoid deformation caused by too fast cooling speed.

[0030] The main pressure is increased in three stages: in the first stage, the pressure is increased to 5Mpa at a rate of 0.1 Mpa / s, and is held for 20-30s; in the second stage, the pressure is increased to 8Mpa at a rate of 0.05Mpa / s, and is held for 30-50s; in the third stage, the pressure is increased to 10-12Mpa at a rate of 0.1Mpa / s, and is held for 200-240s.

[0031] Preferably, the first stage is pressurized to 5 MPa at a pressurizing speed of 0.1 MPa / s and held for 25 s; the second stage is pressurized to 8 MPa at a pressurizing speed of 0.05 MPa / s and held for 45 s; and the third stage is pressurized to 11 MPa at a pressurizing speed of 0.1 MPa / s and held for 220 s. The first stage pressurization can extrude the excess sodium silicate and water in the bamboo pieces, and can make the bamboo pieces absorb the sodium silicate and fill the pores of the bamboo pieces, so that the structure of the bamboo pieces is more uniform and compact. Then, the second stage pressurization can make the bamboo pieces begin to tightly bond through gluing, and the outer surface of the bamboo pieces is not affected by the sodium silicate solution and water extruded in the first stage, so that the gluing is firm. The third stage is used for positioning the bamboo pieces, so that the bamboo board does not rebound after hot pressing and the structure of the bamboo board is not affected.

[0032] S5 drying: the cooled bamboo board blank is dried by using a microwave with a power of 300-800 W, the drying temperature is controlled at 45-75 DEG C, and the drying time is 24-48 h. Preferably, the drying time is 36-45 h, more preferably, the drying time is 40 / 42 / 43 h, so as to ensure the drying effect and the quality of the bamboo board.

[0033] S6 cutting and forming: the dried bamboo board is cut into the required size, and the surface is polished to obtain the bamboo board.

[0034] The bamboo pieces are soaked in sodium silicate, so that the sodium silicate fully penetrates into the bamboo fibers of the bamboo pieces, and is solidified through microwave heating, so that the sodium silicate and the bamboo fiber structure are integrated, the bamboo pieces have higher density, and the pores in the internal structure of the bamboo pieces are filled, so that the structure of the bamboo pieces is more solid and durable. In addition, the sodium silicate can also make the bamboo pieces have fireproof performance. The microwave technology is used for processing the bamboo pieces, so that the structure of the bamboo pieces is more uniform and compact, the strength is higher, and the waterproof performance and corrosion resistance are improved. In addition, through hot pressing, the bamboo pieces are processed into a board through high temperature and high pressure, so that the structure of the board is more compact, the strength is higher, the water resistance is improved, and the board is not easy to absorb water and crack. The hot pressing technology can form a dense hydrophobic layer on the surface of the bamboo board, which can effectively prevent water absorption and water droplets.

[0035] The bamboo pieces are soaked in sodium silicate, and then solidified, hot pressed and dried through microwave, so that the internal structure of the bamboo board is strengthened, the sodium silicate is filled and solidified, the structure of the bamboo board is more uniform and compact, the structural strength of the bamboo board is improved, and the durability is good. The sodium silicate can avoid surface condensation of water droplets after solidification, improve the waterproof and durability of the bamboo board, and reduce the cracking of the bamboo board.

[0036] Example Two

[0037] A method for manufacturing a bamboo board, comprising the following steps:

[0038] S1 Bamboo piece processing: making a bamboo piece from a bamboo, and removing the green bamboo, yellow bamboo and burrs on the bamboo piece;

[0039] S2 Soaking: soaking the bamboo piece in a sodium silicate aqueous solution with a temperature of 126°C for 48h; the thickness of the bamboo piece is 0.3cm, which can shorten the soaking time, shorten the absorption time of the sodium silicate by the bamboo piece, and improve the leaching rate of the organic matter inside the bamboo piece; the concentration of the sodium silicate aqueous solution is 2-10mol / L; preferably, the concentration of the sodium silicate aqueous solution is 3-7mol / L; more preferably, the concentration of the sodium silicate aqueous solution in the embodiment is 7mol / L, which can ensure that the bamboo piece can sufficiently absorb the sodium silicate aqueous solution, avoid that the viscosity of the aqueous solution is too large to affect the absorption of the sodium silicate by the bamboo piece, improve the release of the organic matter inside the bamboo piece, and avoid affecting the service life of the bamboo piece.

[0040] S3 Solidification: draining the water from the soaked bamboo piece, and heating and solidifying the bamboo piece by microwave treatment with a power of 2000W for 5min; the solidification temperature is 190°C, which can improve the solidification effect and ensure that the sodium silicate on the surface of the bamboo piece and the sodium silicate inside the bamboo piece can be solidified.

[0041] S4 Hot pressing: stacking the solidified bamboo pieces in order, and hot pressing the bamboo pieces by controlling the main pressure to be 11-15Mpa, the side pressure to be 7Mpa, and the temperature to be 130°C for 300s; after the hot pressing and gluing are completed, the temperature is lowered to room temperature to form a bamboo board blank; the temperature is lowered by air cooling, which can ensure the quality of the bamboo board and avoid deformation caused by too fast cooling speed.

[0042] Preferably, the main pressure adopts three-stage pressurization, the first stage is pressurized to 5 MPa at a pressurization speed of 0.1 MPa / s and held for 20-30 s; the second stage is pressurized to 8 MPa at a pressurization speed of 0.05 MPa / s and held for 30-50 s; and the third stage is pressurized to 10-12 MPa at a pressurization speed of 0.1 MPa / s and held for 200-240 s. In the embodiment, the first stage is pressurized to 5 MPa at a pressurization speed of 0.1 MPa / s and held for 25 s; the second stage is pressurized to 8 MPa at a pressurization speed of 0.05 MPa / s and held for 45 s; and the third stage is pressurized to 11 MPa at a pressurization speed of 0.1 MPa / s and held for 220 s. The first stage pressurization can extrude and discharge the excess sodium silicate and water in the bamboo pieces, and can make the bamboo pieces absorb the sodium silicate and fill the pores of the bamboo pieces, so that the structure of the bamboo pieces is more uniform and dense. The second stage pressurization can make the bamboo pieces begin to tightly bond through gluing, and the outer surface of the bamboo pieces is not affected by the sodium silicate solution and water discharged in the first stage pressurization, so the gluing is firm. The third stage is used for positioning the bamboo pieces to avoid the rebound of the bamboo board after hot pressing and affect the structure of the bamboo board.

[0043] S5 drying: the cooled bamboo board blank is dried by using a microwave with a power of 780 W, and the drying temperature is controlled at 65°C; and the drying time is 24-48 h. Preferably, the drying time is 36-45 h; more preferably, the drying time is 44 h in the embodiment, so as to ensure the drying effect and the quality of the bamboo board.

[0044] S6 cutting and forming: the dried bamboo board is cut to the required size, and the surface is polished to obtain a bamboo board with a thickness of 2 cm to ensure the structural strength of the bamboo board. Preferably, after polishing, a veneer is glued on the upper and lower surfaces of the bamboo board, and hot pressing is performed at a pressure of 5-10 MPa and a temperature of 90-98°C for 180-280 s. The veneer has the functions of hydrophobicity, fireproofness and fire resistance, and further improves the waterproofness and durability of the bamboo board. Preferably, in the embodiment, hot pressing is performed at a pressure of 8 MPa and a temperature of 96°C for 270 s, so as to facilitate the adhesion of the veneer to the bamboo board and avoid the occurrence of gaps, and further reduce the cracking of the bamboo board.

[0045] The scheme is that the bamboo chips are soaked in sodium silicate, so that the sodium silicate is fully infiltrated into the bamboo fibers of the bamboo chips, and is solidified through microwave heating, so that the sodium silicate is integrated with the fiber structure of the bamboo chips, the density of the bamboo chips is higher, the pores in the internal structure of the bamboo chips are filled, the structure of the bamboo is more solid and durable, in addition, the sodium silicate can also make the bamboo have fireproof performance; the bamboo is processed by using the microwave technology, so that the structure of the bamboo is more uniform and dense, the strength is higher, and the waterproof performance and the corrosion resistance are also improved; in addition, through hot pressing, the bamboo chips are processed into a plate by using high temperature and high pressure, so that the structure of the plate is further compacted and the strength is higher, and the water resistance is also improved, and the plate is not easy to absorb water and crack; some components in the bamboo will undergo physical or chemical reactions, so that the structure of the bamboo is more uniform and the strength is higher, and the problem of bamboo plate cracking is solved.

[0046] The bamboo chips are soaked in sodium silicate, and then solidified by microwave, hot pressing and microwave drying, so that the internal structure of the bamboo plate is strengthened, the sodium silicate is filled and solidified, the structure of the bamboo plate is more uniform and dense, so that the structural strength of the bamboo plate is improved and the durability is good, the surface condensation water droplets can be avoided after the sodium silicate is solidified, and a veneer is arranged on the surface of the bamboo plate, so that the waterproofness and durability of the bamboo plate are further improved, and the cracking of the bamboo plate is reduced.

[0047] Example three

[0048] A bamboo plate manufacturing method, comprising the following steps:

[0049] S1 bamboo chip processing: the bamboo is made into bamboo chips, and the bamboo green, bamboo yellow and burrs on the bamboo chips are removed;

[0050] S2 soaking: the bamboo chips are soaked in a sodium silicate aqueous solution with a temperature of 134 DEG C for 70h; the thickness of the bamboo chips is 0.6cm, so that the soaking time is shortened, the absorption time of the bamboo chips to the sodium silicate is shortened, and the leaching rate of the organic matter in the bamboo chips is improved; the concentration of the sodium silicate aqueous solution is 4mol / L, so that the bamboo chips can sufficiently absorb the sodium silicate aqueous solution, the viscosity of the aqueous solution is prevented from being too large to affect the absorption of the sodium silicate by the bamboo chips, the release of the organic matter in the bamboo chips is improved, and the service life of the bamboo chips is prevented from being affected.

[0051] S3 solidification: the soaked bamboo chips are drained, and are heated and solidified by microwave treatment with a power of 1500W for 9min; the solidification temperature is 160 DEG C, so that the solidification effect is improved, and the sodium silicate on the surface of the bamboo chips and the sodium silicate in the bamboo chips can be solidified.

[0052] S4 hot pressing: after curing, the bamboo chips are stacked neatly, and hot pressing is performed at a main pressure of 11-15 MPa, a side pressure of 7-8 MPa, and a temperature of 110-160°C for 190-300 s. After the adhesive hot pressing is completed, the temperature is lowered to room temperature to form a bamboo board blank. Air cooling is used to lower the temperature, which helps to ensure the quality of the bamboo board and avoid deformation caused by too fast cooling speed. Preferably, the main pressure is increased in three stages: in the first stage, the pressure is increased to 6 MPa at a rate of 0.1 MPa / s and held for 28 s; in the second stage, the pressure is increased to 9 MPa at a rate of 0.05 MPa / s and held for 35 s; in the third stage, the pressure is increased to 14 MPa at a rate of 0.1 MPa / s and held for 200 s. The first stage of pressure increase can extrude and remove excess sodium silicate and water from the inside of the bamboo chips, and can also retain the sodium silicate absorbed by the bamboo chips in the bamboo chips and fill the pores of the entire bamboo chip, making the structure of the bamboo more uniform and dense. The second stage of pressure increase can make the bamboo chips begin to tightly bond through adhesion, and the outer surface of the bamboo chips is not affected by the sodium silicate solution and water removed in the first stage of pressure increase, so the adhesion is firm. The third stage is used for positioning the bamboo chips to avoid rebounding of the bamboo board after hot pressing, which affects the structure of the bamboo board.

[0053] S5 drying: the cooled bamboo board blank is dried using a 500W microwave with a drying temperature of 50°C for 47h to ensure the drying effect and the quality of the bamboo board.

[0054] S6 cutting and forming: the dried bamboo board is cut to the desired size and the surface is polished to form a bamboo board with a thickness of 2.2 cm to ensure the structural strength of the bamboo board. Preferably, after polishing, a veneer is adhered to the upper and lower surfaces of the bamboo board, and hot pressing is performed at a pressure of 5-10 MPa and a temperature of 90-98°C for 180-280 s. The veneer has the functions of hydrophobicity, fire resistance, and fire resistance, which further improves the waterproofness and durability of the bamboo board. Preferably, hot pressing is performed at a pressure of 6 MPa and a temperature of 91°C for 220 s to facilitate the adhesion of the veneer to the bamboo board and avoid gaps, which further reduces the cracking of the bamboo board.

[0055] The scheme is to soak the bamboo pieces in sodium silicate, so that the sodium silicate fully penetrates into the bamboo fibers of the bamboo pieces, and is solidified by microwave heating, so that the sodium silicate and the bamboo piece fiber structure are integrated, the bamboo piece density is higher, the pores in the internal structure of the bamboo piece are filled, the structure of the bamboo material is more solid and durable, in addition, the sodium silicate can also make the bamboo material have fireproof performance; the microwave technology is used for processing the bamboo material, so that the structure of the bamboo material is more uniform and dense, the strength is higher, and the waterproof performance and corrosion resistance are also improved; in addition, through hot pressing, the bamboo pieces are processed into plates by using high temperature and high pressure, so that the structure of the plate is further compacted and the strength is higher, and the water resistance is also improved, and the plate is not easy to absorb water and crack; some components in the bamboo material will undergo physical or chemical reactions, so that the structure of the bamboo material is more uniform and the strength is higher, and the problem of bamboo plate cracking is solved.

[0056] The present application adopts the processing technology of soaking bamboo pieces in sodium silicate, then solidifying by microwave, hot pressing and microwave drying, so that the internal structure of the bamboo plate is strengthened, the sodium silicate is filled and solidified, the structure of the bamboo plate is more uniform and dense, so that the structural strength of the bamboo plate is improved and the durability is good, the sodium silicate can avoid surface condensation after solidification, and a veneer is arranged on the surface of the bamboo plate, further improving the waterproofness and durability of the bamboo plate, and reducing the cracking of the bamboo plate.

[0057] Example four

[0058] The present embodiment is a comparative example, which adopts conventional bamboo plates in the market, such as paint-free plates, solid wood plates or particle boards, or adopts the same bamboo pieces, which are steamed and dried, then formed by gluing and hot pressing, and then cut into the same size as the above examples.

[0059] The plates in examples one to three and comparative example four are subjected to fireproof test: the test method is carried out according to GB8624-2006 standard, and is classified as A1, A2, B, C, D, E and F;

[0060] Waterproof test: the test method is to soak the plate in water with a depth of 0.5m, observe the water absorption and cracking of the plate or the waterproof effect every 24h, 48h and 72h, and record the data;

[0061] Structural strength test: a hydraulic cylinder is used to press the plate to check the pressure strength of the plate;

[0062] The test structure is as follows:

[0063]

[0064] From the above test structure can know that the structural strength, waterproof and fireproof grade of the plate produced by the application are better than the structural strength of the bamboo plate on the market, the fireproof grade is obviously improved by one grade, the waterproof time is longer, and the compressive strength is higher.

[0065] The above is the preferred embodiment of the application and the technical principle used thereby, and for those skilled in the art, any equivalent transformation, simple replacement and the like based on the technical solution of the application without departing from the spirit and scope of the application shall belong to the protection scope of the application.

Claims

1. A method for manufacturing a bamboo board, characterized by, The method comprises the following steps: S1 bamboo chip processing: making bamboo into bamboo chips and removing the green bamboo, yellow bamboo and burrs on the bamboo chips; S2 soaking: soaking the bamboo chips in a sodium silicate aqueous solution with a temperature of 125-135℃ for 24-72h; S3 curing: draining the water of the soaked bamboo chips and curing by microwave treatment with a power of 500-2000W for 2-10min; S4 hot pressing: stacking the cured bamboo chips in order, hot pressing with a main pressure of 10-12Mpa, a side pressure of 7-8Mpa and a temperature of 110-160℃ for 190-300s, and then cooling to room temperature to form a bamboo board blank; S5 drying: drying the cooled bamboo board blank by microwave with a power of 300-800W and a drying temperature of 45-75℃; S6 cutting and forming: cutting the dried bamboo board blank into the required size and polishing the surface; The main pressure is increased in three stages, the first stage is increased to 5Mpa at a speed of 0.1Mpa / s and held for 20-30s; The second stage is increased to 8Mpa at a speed of 0.05Mpa / s and held for 30-50s; the third stage is increased to 10-12Mpa at a speed of 0.1Mpa / s and held for 200-240s; The concentration of the sodium silicate aqueous solution is 2-10mol / L.

2. The method of claim 1, wherein: In step S5, the drying time is 24-48h.

3. The method of claim 1, wherein: In step S4, the temperature is cooled by air cooling.

4. The method of claim 1, wherein: The thickness of the bamboo chips is 0.2-0.7cm.

5. The method of claim 1, wherein: The thickness of the bamboo board is 1.5-4cm.

6. The method of claim 1, wherein: In step S3, the curing temperature is 150-198℃.

7. The method according to any one of claims 1-6, wherein: After polishing, the upper and lower surfaces of the bamboo board are glued with a veneer, hot pressed at a pressure of 5-10Mpa and a temperature of 90-98℃ for 180-280s.

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