Bamboo plywood

Abstract

The invention relates to the technical field of bamboo plywood processing, and in particular to a bamboo plywood, comprising an upper decorative board, a multi-layer bamboo board and a lower decorative board from top to bottom; the manufacturing method of the bamboo plywood comprises: selecting bamboo strips of equal thickness with each surface being a rough surface, and obtaining bamboo strips by soaking the bamboo strips of equal thickness into resin glue; using warp and weft strips to press and pick up and weave up and down, and obtaining a rough blank by eliminating the weft without leaving any gaps, and obtaining a bamboo board by stretching the bamboo strips of the rough blank; and applying connecting glue on the lower surface of the bamboo board and the lower surface of the upper decorative board respectively, and then hot pressing and forming; the invention facilitates the subsequent generation of sufficient friction between the bamboo board and the boards of other layers or between the bamboo strips by processing each surface into a rough surface of equal thickness bamboo strips, and combined with the pre-tightening design, the ultimate bearing capacity and rigidity of the bamboo plywood can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of bamboo-wood plywood processing, in particular to a bamboo plywood. Background Art

[0002] At present, the plywood made of bamboo as raw material in the prior art generally adopts a flat rectangular shape in appearance, and the combined structures include single-layer all-bamboo plywood, multi-layer all-bamboo plywood, bamboo-wood composite board, medium and high-density bamboo fiberboard, bamboo fiber cement composite board, etc. Among them, the structure of the multi-layer all-bamboo plywood is generally formed by weaving multiple layers of bamboo sheets and then stacking and pressing them. Because the bamboo plywood of this shape and structure has a simple manufacturing process and is easy to process, but the bearing capacity is also average and the rigidity is insufficient. Therefore, a bamboo plywood with better bearing capacity and rigidity is provided. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a bamboo plywood with better bearing capacity and rigidity.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A bamboo plywood comprises, from top to bottom, an upper decorative board, a multi-layer bamboo board and a lower decorative board; a manufacturing method of the bamboo plywood comprises:

[0006] Step S1, cutting large-diameter bamboo into bamboo segments, milling off outer nodes and then longitudinally cutting into a plurality of arc-shaped bamboo strips, milling off inner nodes and steaming and softening, heating and pressurizing, unfolding the arc-shaped bamboo strips into a plane, and processing them into bamboo strips of equal thickness without bamboo green or bamboo yellow and with rough surfaces on each surface through double-sided planing, and collecting the bamboo fibers planed off;

[0007] Step S2, heating and shaping bamboo strips of equal thickness in a mold and draining water to obtain dry bamboo strips;

[0008] Step S3, putting the dry bamboo strips into a soaking tank, wherein the soaking tank has a cover plate, after the cover plate is installed, negative pressure is first applied to precipitate bubbles in the dry bamboo strips, and then resin glue is added into the soaking tank and pressurized until the resin glue penetrates into the dry bamboo strips, then the dry bamboo strips are taken out, and after drying, a bamboo strip having a glue film on the surface is formed;

[0009] Step S4, using warp and weft strips to press and weave one by one, and the weft is eliminated without leaving any gaps to obtain a rough blank, wherein the strips in the longitude direction of the rough blank are longer than the rough blank itself and extend to the left and right sides of the rough blank; the strips in the latitude direction of the rough blank are longer than the rough blank itself and extend to the front and back sides of the rough blank;

[0010] Step S5, laying the lower decorative board, the multi-layer rough blank, and the upper decorative board from bottom to top in the tensioning plate, the tensioning plate is rectangular, and a laying groove is opened on the tensioning plate, and a hot press is arranged above the laying groove; laying the upper and lower decorative boards on the laying groove, the four side edges of the tensioning plate are the left edge, the right edge, the front edge, and the rear edge, and the left edge, the right edge, the front edge, and the rear edge are respectively provided with stretching holes for the dry bamboo strips of the rough blank to pass through, the stretching holes of the left edge and the front edge are respectively provided with clamping parts, and the stretching holes of the right edge and the rear edge are respectively provided with jacks; when laying the rough blank in the tensioning plate, the bamboo strips on the four side edges of the rough blank are respectively Through the stretching holes of the left edge, the right edge, the front edge and the rear edge, the clamping pieces of the left edge and the front edge clamp the bamboo strips extending from the left and front sides of the rough blank, and the jacks of the right edge and the rear edge clamp the bamboo strips extending from the right and rear sides of the rough blank, stretch them to a predetermined tensile force and then fix them, and the bamboo strips of the rough blank are stretched to obtain a bamboo board; the lower surface of the bamboo board and the lower surface of the upper decorative board are coated with connecting glue respectively, and the connecting glue is obtained by mixing resin glue and planed bamboo fibers; after the lower decorative board, the multi-layer bamboo board and the upper decorative board are paved, the hot press is started to hot-press the lower decorative board, the multi-layer bamboo board and the upper decorative board for a predetermined time to form a embryo board;

[0011] Step S6: The hot press moves upward, the clamping parts and the jack are released, the embryo board is taken out, and the embryo board is cut according to a predetermined size to obtain bamboo plywood.

[0012] Preferably, after the cover plate is installed, negative pressure is first applied to precipitate bubbles in the dry bamboo strips to determine whether the dry bamboo strips are broken or split. If so, the broken or split dry bamboo strips are screened out; then the soaking pool is pressurized until the resin glue penetrates into the dry bamboo strips, and then the dry bamboo strips are taken out, and after air drying, bamboo strips with a glue film are formed on the surface of the dry bamboo strips.

[0013] Preferably, the jacks at the right edge and the rear edge clamp the bamboo strips extending from the right and rear sides of the rough blank and stretch them to a predetermined tension to determine whether there are gaps between the bamboo strips in the longitude direction and between the bamboo strips in the latitude direction. If there are gaps, the positions of the bamboo strips are adjusted to fill the gaps and then fixed. The bamboo strips of the rough blank are stretched to obtain a bamboo board.

[0014] Preferably, a vibrating device is also provided on the tensioning disk. After the lower decorative board, the multi-layer bamboo board and the upper decorative board are paved, the vibrating device is used to vibrate the lower decorative board, the multi-layer bamboo board and the upper decorative board, and then the hot press is started to hot press the lower decorative board, the multi-layer bamboo board and the upper decorative board for a predetermined time to form a embryo board.

[0015] Preferably, resin glue is coated on the edges of the bamboo plywood obtained by cutting.

[0016] Preferably, the resin glue is insect-proof resin glue.

[0017] Preferably, bamboo strips of equal thickness are heated and shaped in a mold and moisture is discharged to obtain dry bamboo strips, and the moisture content of the dry bamboo strips is less than 5%.

[0018] Preferably, the planed bamboo fibers are dried and straightened, then added to the resin glue and stirred to obtain the connecting glue.

[0019] Preferably, the strips in the longitudinal direction of the rough blank are longer than the rough blank itself and extend out of the left and right sides of the rough blank, and a slot is provided on the extended part; the strips in the latitude direction of the rough blank are longer than the rough blank itself and extend out of the front and back sides of the rough blank, and a slot is provided on the extended part;

[0020] The clamping parts at the left and front edges clamp the slots on the bamboo strips extending from the left and front sides of the rough blank, and the jacks at the right and rear edges clamp the slots on the bamboo strips extending from the right and rear sides of the rough blank, stretch them to a predetermined tension, and then fix them.

[0021] Preferably, the hot press moves upward, the clamping parts and the jack are loosened, the embryonic plate is removed, and the connecting glue squeezed out of the paving groove is cleaned.

[0022] The beneficial effects of the present invention are as follows: by processing each surface of the bamboo strips into a rough surface of equal thickness, it is convenient to provide sufficient friction between the subsequent bamboo board and the board of other layers or to generate sufficient friction between the bamboo strips, and then with the pre-tightening design, it is avoided that the smooth bamboo surface slides relative to each other, so that the prestressing will not fail due to relative sliding, and through the effect of prestressing, the ultimate bearing capacity and rigidity of the bamboo plywood can be improved; further, the residual tensile stress of the pre-stretched bamboo strips can complement the compressive stress generated by the curing shrinkage of the resin glue, further improving the overall bending or tensile properties of the bamboo strips, and at the same time, the effect of the glue film can also fill the tiny gaps between the dry bamboo strips, avoiding the subsequent connection glue from failing to fill these tiny gaps due to various problems; the rough surface of the bamboo strips also It is also convenient for subsequent clamping, thereby reducing the difficulty of stretching and improving efficiency; by collecting the planed bamboo fibers and mixing them with resin glue, the dispersed bamboo fibers can be used as secondary reinforcing ribs to achieve irregular multi-directional force conduction, realize the recycling of bamboo fibers, and further improve the mechanical properties of the final formed bamboo plywood; and the provision of a glue film can prevent glue flow during hot pressing, and can improve the brittleness of the glue layer after curing; by first sucking out the bubbles in the dry bamboo strips with negative pressure, and then infiltrating with resin glue, the finally formed glue layer will not fail or locally generate air cavities during the final hot pressing due to the heat expansion of the bubbles in the dry bamboo strips, thereby causing internal stress concentration, and then causing the problem of internal stress failure of the bamboo plywood once the air cavity is damaged during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A schematic structural diagram of a bamboo plywood according to a specific embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of a bamboo plywood tensioning plate according to a specific embodiment of the present invention;

[0025] Figure 3 A schematic structural diagram of a rough blank of bamboo plywood according to a specific embodiment of the present invention;

[0026] Figure 4 A schematic diagram of a rough blank of bamboo plywood according to a specific embodiment of the present invention;

[0027] Explanation of the reference numbers: 1. Upper decorative board; 2. Bamboo board; 3. Lower decorative board; 4. Bamboo strips; 5. Rough blank; 6. Tensioning plate; 61. Paving trough; 62. Clamping piece; 63. Jack. DETAILED DESCRIPTION

[0028] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0029] Please refer to Figures 1 to 4 A bamboo plywood comprises, from top to bottom, an upper decorative board 1, a multi-layer bamboo board 2 and a lower decorative board 3; a method for making the bamboo plywood comprises:

[0030] Step S1, cutting large-diameter bamboo into bamboo segments, milling off outer nodes and then longitudinally cutting into a plurality of arc-shaped bamboo strips, milling off inner nodes and steaming and softening, heating and pressurizing, unfolding the arc-shaped bamboo strips into a plane, and processing them into bamboo strips of equal thickness without bamboo green or bamboo yellow and with rough surfaces on each surface through double-sided planing, and collecting the bamboo fibers planed off;

[0031] Step S2, heating and shaping bamboo strips of equal thickness in a mold and draining water to obtain dry bamboo strips;

[0032] Step S3, putting the dry bamboo strips into a soaking tank, wherein the soaking tank has a cover plate, after the cover plate is installed, negative pressure is first applied to precipitate bubbles in the dry bamboo strips, and then resin glue is added to the soaking tank and pressurized until the resin glue penetrates into the dry bamboo strips, then the dry bamboo strips are taken out, and a bamboo strip sheet 4 with a glue film is formed on the surface after drying;

[0033] Step S4, using the warp and weft strips 4 to press and weave one by one, and the weft is eliminated without leaving any gaps to obtain a rough blank 5, wherein the strips 4 in the longitude direction of the rough blank are longer than the rough blank itself and extend to the left and right sides of the rough blank; the strips 4 in the latitude direction of the rough blank are longer than the rough blank itself and extend to the front and back sides of the rough blank;

[0034] Step S5, laying the lower decorative board 3, the multi-layer rough blank 5, and the upper decorative board 1 from bottom to top in the tensioning plate 6, the tensioning plate 6 is rectangular, and a laying groove 61 is opened on the tensioning plate 6, and a hot press is arranged above the laying groove 61; laying the upper and lower decorative boards 3 on the laying groove 61, the four side edges of the tensioning plate 6 are the left edge, the right edge, the front edge, and the rear edge, and the left edge, the right edge, the front edge, and the rear edge are respectively provided with stretching holes for the dry bamboo strips of the rough blank 5 to pass through, the stretching holes of the left edge and the front edge are respectively provided with clamping parts 62, and the stretching holes of the right edge and the rear edge are respectively provided with jacks 63; when laying the rough blank 5 in the tensioning plate 6, the bamboo strips on the four side edges of the rough blank are 4 respectively pass through the stretching holes of the left edge, the right edge, the front edge and the rear edge, the clamping pieces 62 of the left edge and the front edge clamp the bamboo strips 4 extending from the left side and the front side of the rough blank, the jacks 63 of the right edge and the rear edge clamp the bamboo strips 4 extending from the right side and the rear side of the rough blank, stretch them to a predetermined tensile force and then fix them, the bamboo strips 4 of the rough blank are stretched to obtain the bamboo board 2; the lower surface of the bamboo board 2 and the lower surface of the upper decorative board 1 are coated with connecting glue, the connecting glue is obtained by mixing resin glue and planed bamboo fibers; after the lower decorative board 3, the multi-layer bamboo board 2 and the upper decorative board 1 are paved, the hot press is started to hot press the lower decorative board 3, the multi-layer bamboo board 2 and the upper decorative board 1 for a predetermined time to form a blank;

[0035] Step S6, the hot press moves upward, the clamping member 62 and the jack 63 are released, the embryo board is taken out, and the embryo board is cut according to a predetermined size to obtain the bamboo plywood.

[0036] From the above description, it can be seen that by processing each surface into a rough surface of equal-thick bamboo strips, it is convenient to provide sufficient friction between the subsequent bamboo board 2 and the other layers of boards or to generate sufficient friction between the bamboo strips. Combined with the pre-tightening design, relative sliding of the smooth bamboo surface can be avoided, so that the prestressing will not fail due to relative sliding. Through the effect of prestressing, the ultimate bearing capacity and rigidity of the bamboo plywood can be improved; further, the residual tensile stress of the pre-stretched bamboo strips can complement the compressive stress generated by the curing shrinkage of the resin glue, further improving the overall bending or tensile properties of the bamboo strips. At the same time, the effect of the adhesive film can also fill the tiny gaps between the dry bamboo strips, avoiding the subsequent connection glue from failing to fill these tiny gaps due to various problems; the rough surface of the bamboo strips also It is convenient for subsequent clamping, thereby reducing the difficulty of stretching and improving efficiency; by collecting the planed bamboo fibers and mixing them with resin glue, the dispersed bamboo fibers can be used as secondary reinforcing ribs to achieve the conduction of irregular multi-directional forces, realize the recycling of bamboo fibers and further improve the mechanical properties of the final formed bamboo plywood; and the provision of a glue film can prevent glue flow during hot pressing, and can improve the brittleness of the glue layer after curing; by first sucking out the bubbles in the dry bamboo strips with negative pressure and then infiltrating with resin glue, the final formed glue layer will not fail or locally generate air cavities during the final hot pressing due to the heat expansion of the bubbles in the dry bamboo strips, thereby causing the concentration of internal stress, and then causing the problem of internal stress failure of the bamboo plywood once the air cavity is damaged during use.

[0037] Furthermore, after the cover plate is installed, negative pressure is first applied to precipitate bubbles in the dry bamboo strips to determine whether the dry bamboo strips are broken or split. If so, the broken or split dry bamboo strips are screened out; then the soaking pool is pressurized until the resin glue penetrates into the dry bamboo strips, and then the dry bamboo strips are taken out, and after air drying, bamboo strips 4 with a glue film are formed on the surface of the dry bamboo strips.

[0038] From the above description, it can be seen that due to the effect of negative pressure, the cavity or residual bubbles in the bamboo can be enlarged, so that the defective bamboo pieces can be screened out, thereby ensuring the performance of the subsequent bamboo plywood.

[0039] Furthermore, the jacks 63 at the right edge and the rear edge clamp the bamboo strips 4 extending from the right side and the rear side of the rough blank and stretch them to a predetermined tension to determine whether there are gaps between the bamboo strips 4 in the longitude direction and between the bamboo strips 4 in the latitude direction. If there are gaps, the positions of the bamboo strips 4 are adjusted to fill the gaps and then fixed. The bamboo strips 4 of the rough blank are stretched to obtain the bamboo board 2.

[0040] From the above description, it can be seen that by adjusting the strips 4 to fill the gaps after stretching, it can ensure that the density of the formed bamboo plywood is more uniform, thereby ensuring better bearing capacity.

[0041] Furthermore, a vibrating device is also provided on the tensioning plate 6. After the lower decorative board 3, the multi-layer bamboo board 2 and the upper decorative board 1 are laid, the vibrating device is used to vibrate the lower decorative board 3, the multi-layer bamboo board 2 and the upper decorative board 1, and then the hot press is started to hot press the lower decorative board 3, the multi-layer bamboo board 2 and the upper decorative board 1 for a predetermined time to form a embryo board.

[0042] From the above description, it can be seen that the bubbles in the connecting glue can be discharged through the vibrating device to ensure the connection effect.

[0043] Furthermore, resin glue is coated on the edges of the bamboo plywood obtained by cutting.

[0044] From the above description, it can be known that by coating the bamboo plywood with resin glue, the insect-proof effect and the sealing effect can be ensured.

[0045] Furthermore, the resin glue is insect-proof resin glue.

[0046] From the above description, it can be seen that by adopting the insect-proof resin glue, an insect-proof effect can be achieved, thereby ensuring the insect-proof effect of the bamboo plywood.

[0047] Furthermore, bamboo strips of equal thickness are heated and shaped in a mold and water is discharged to obtain dry bamboo strips, and the moisture content of the dry bamboo strips is less than 5%.

[0048] Furthermore, the planed bamboo fibers are dried and straightened, then added into the resin glue and stirred to obtain the connecting glue.

[0049] From the above description, it can be seen that since bamboo fiber is easy to curl after being planed or heated and dried, it needs to be straightened to ensure that it can play the role of secondary reinforcement.

[0050] Furthermore, the strips 4 in the longitudinal direction of the rough blank are longer than the rough blank itself and extend out of the left and right sides of the rough blank, and a slot is provided on the extended part; the strips 4 in the latitude direction of the rough blank are longer than the rough blank itself and extend out of the front and back sides of the rough blank, and a slot is provided on the extended part;

[0051] The clamping piece 62 at the left edge and the front edge clamps the slot on the part of the bamboo strip 4 extending from the left side and the front side of the rough blank, and the jack 63 at the right edge and the rear edge clamps the slot on the part of the bamboo strip 4 extending from the right side and the rear side of the rough blank, stretches it to a predetermined tension, and then fixes it.

[0052] It can be seen from the above description that the clamping effect can be improved by providing a clamping slot.

[0053] Furthermore, the hot press moves upward, the clamping piece 62 and the jack 63 are loosened, the embryonic board is taken out, and the connecting glue squeezed out of the paving groove 61 is cleaned. Embodiment 1

[0054] A bamboo plywood comprises, from top to bottom, an upper decorative board 1, a multi-layer bamboo board 2 and a lower decorative board 3; a method for manufacturing the bamboo plywood comprises:

[0055] Step S1, cutting large-diameter bamboo into bamboo segments, milling off the outer nodes and then longitudinally cutting into a plurality of arc-shaped bamboo strips, milling off the inner nodes and steaming and softening, heating and pressurizing, unfolding the arc-shaped bamboo strips into a plane, and processing them into bamboo strips of equal thickness without bamboo green and bamboo yellow and with each surface being a rough surface through double-sided planing, and collecting the bamboo fibers planed off; bamboo green and bamboo yellow are the differences in the colors of the inside and outside of bamboo. The green skin of bamboo is called bamboo green, and the yellow inner surface of the bamboo cavity is called bamboo yellow.

[0056] Step S2, heating and shaping bamboo strips of equal thickness in a mold and draining out moisture to obtain dry bamboo strips, wherein the moisture content of the dry bamboo strips is less than 5%.

[0057] Step S3, putting the dry bamboo strips into a soaking tank, wherein the soaking tank has a cover plate, and after the cover plate is installed, negative pressure is first applied to precipitate bubbles in the dry bamboo strips, and then it is determined whether the dry bamboo strips are broken or split, and if so, the broken or split dry bamboo strips are screened out; then the soaking tank is pressurized until the resin glue penetrates into the dry bamboo strips, and then the dry bamboo strips are taken out, and after air drying, a bamboo strip 4 with a glue film is formed on the surface of the dry bamboo strips.

[0058] Step S4, using the warp and weft strips 4 to press and weave one by one, and the weft is eliminated without leaving any gaps to obtain a rough blank 5, wherein the strips 4 in the longitude direction of the rough blank are longer than the rough blank itself and extend to the left and right sides of the rough blank; the strips 4 in the latitude direction of the rough blank are longer than the rough blank itself and extend to the front and back sides of the rough blank;

[0059] Step S5, laying the lower decorative board 3, the multi-layer rough blank 5, and the upper decorative board 1 from bottom to top in the tensioning disk 6, the tensioning disk 6 is rectangular, and a laying groove 61 is opened on the tensioning disk 6, and a hot press is arranged above the laying groove 61; laying the upper and lower decorative boards 3 on the laying groove 61, the four side edges of the tensioning disk 6 are the left edge, the right edge, the front edge, and the rear edge, and the left edge, the right edge, the front edge, and the rear edge are respectively provided with stretching holes for the dry bamboo strips of the rough blank 5 to pass through, the stretching holes of the left edge and the front edge are respectively provided with clamping parts 62, and the stretching holes of the right edge and the rear edge are respectively provided with jacks 63; when laying the rough blank 5 in the tensioning disk 6, the bamboo strips 4 on the four side edges of the rough blank pass through the stretching holes of the left edge, the right edge, the front edge, and the rear edge respectively, and the left edge The clamping piece 62 at the front edge clamps the bamboo strips 4 extending from the left side and the front side of the rough blank, and the jacks 63 at the right edge and the rear edge clamp the bamboo strips 4 extending from the right side and the rear side of the rough blank and stretch them to a predetermined tension, and judge whether there are gaps between the bamboo strips 4 in the longitude direction and the latitude direction. If there are gaps, adjust the positions between the bamboo strips 4 to fill the gaps and then fix them. The bamboo strips 4 of the rough blank are stretched to obtain the bamboo board 2; the lower surface of the bamboo board 2 and the lower surface of the upper decorative board 1 are respectively coated with a connecting glue, and the connecting glue is obtained by mixing a resin glue and planed bamboo fibers; after the lower decorative board 3, the multi-layer bamboo board 2, and the upper decorative board 1 are paved, start the hot press to hot-press the lower decorative board 3, the multi-layer bamboo board 2, and the upper decorative board 1 for a predetermined time to form a embryo board;

[0060] Step S6, the hot press moves upward to release the clamping member 62 and the jack 63, remove the embryo board, clean the connection glue squeezed out of the paving groove 61, release the clamping member 62 and the jack 63, remove the embryo board, and cut the embryo board according to the predetermined size to obtain the bamboo plywood. The edges of the cut bamboo plywood are coated with resin glue.

[0061] Wherein, the resin glue is insect-proof resin glue.

[0062] The planed bamboo fibers are dried and straightened, then added to the resin glue and stirred to obtain the connecting glue.

[0063] The strips 4 in the longitudinal direction of the rough blank are longer than the rough blank itself and extend out of the left and right sides of the rough blank, and a slot is provided on the extended part; the strips 4 in the latitude direction of the rough blank are longer than the rough blank itself and extend out of the front and back sides of the rough blank, and a slot is provided on the extended part;

[0064] The clamping piece 62 at the left edge and the front edge clamps the slot on the part of the bamboo strip 4 extending from the left side and the front side of the rough blank, and the jack 63 at the right edge and the rear edge clamps the slot on the part of the bamboo strip 4 extending from the right side and the rear side of the rough blank, stretches it to a predetermined tension, and then fixes it. Embodiment 2

[0065] A bamboo plywood comprises, from top to bottom, an upper decorative board 1, a multi-layer bamboo board 2 and a lower decorative board 3; a method for manufacturing the bamboo plywood comprises:

[0066] Step S1, cutting large-diameter bamboo into bamboo segments, milling off the outer nodes and then longitudinally cutting into a plurality of arc-shaped bamboo strips, milling off the inner nodes and steaming and softening, heating and pressurizing, unfolding the arc-shaped bamboo strips into a plane, and processing them into bamboo strips of equal thickness without bamboo green and bamboo yellow and with each surface being a rough surface through double-sided planing, and collecting the bamboo fibers planed off; bamboo green and bamboo yellow are the differences in the colors of the inside and outside of bamboo. The green skin of bamboo is called bamboo green, and the yellow inner surface of the bamboo cavity is called bamboo yellow.

[0067] Step S2, heating and shaping bamboo strips of equal thickness in a mold and draining out moisture to obtain dry bamboo strips, wherein the moisture content of the dry bamboo strips is less than 5%.

[0068] Step S3, putting the dry bamboo strips into a soaking tank, wherein the soaking tank has a cover plate, and after the cover plate is installed, negative pressure is first applied to precipitate bubbles in the dry bamboo strips, and then it is determined whether the dry bamboo strips are broken or split, and if so, the broken or split dry bamboo strips are screened out; then the soaking tank is pressurized until the resin glue penetrates into the dry bamboo strips, and then the dry bamboo strips are taken out, and after air drying, a bamboo strip 4 with a glue film is formed on the surface of the dry bamboo strips.

[0069] Step S4, using the warp and weft strips 4 to press and weave one by one, and the weft is eliminated without leaving any gaps to obtain a rough blank 5, wherein the strips 4 in the longitude direction of the rough blank are longer than the rough blank itself and extend to the left and right sides of the rough blank; the strips 4 in the latitude direction of the rough blank are longer than the rough blank itself and extend to the front and back sides of the rough blank;

[0070] Step S5, laying the lower decorative board 3, the multi-layer rough blank 5, and the upper decorative board 1 from bottom to top in the tensioning disk 6, the tensioning disk 6 is rectangular, and a laying groove 61 is opened on the tensioning disk 6, and a hot press is arranged above the laying groove 61; laying the upper and lower decorative boards 3 on the laying groove 61, the four side edges of the tensioning disk 6 are the left edge, the right edge, the front edge, and the rear edge, and the left edge, the right edge, the front edge, and the rear edge are respectively provided with stretching holes for the dry bamboo strips of the rough blank 5 to pass through, the stretching holes of the left edge and the front edge are respectively provided with clamping parts 62, and the stretching holes of the right edge and the rear edge are respectively provided with jacks 63; when laying the rough blank 5 in the tensioning disk 6, the bamboo strips 4 on the four side edges of the rough blank pass through the stretching holes of the left edge, the right edge, the front edge, and the rear edge respectively, and the left edge The clamping piece 62 at the front edge clamps the bamboo strips 4 extending from the left side and the front side of the rough blank, and the jacks 63 at the right edge and the rear edge clamp the bamboo strips 4 extending from the right side and the rear side of the rough blank and stretch them to a predetermined tension, and judge whether there are gaps between the bamboo strips 4 in the longitude direction and the latitude direction. If there are gaps, adjust the positions between the bamboo strips 4 to fill the gaps and then fix them. The bamboo strips 4 of the rough blank are stretched to obtain the bamboo board 2; the lower surface of the bamboo board 2 and the lower surface of the upper decorative board 1 are respectively coated with a connecting glue, and the connecting glue is obtained by mixing a resin glue and planed bamboo fibers; after the lower decorative board 3, the multi-layer bamboo board 2, and the upper decorative board 1 are paved, start the hot press to hot-press the lower decorative board 3, the multi-layer bamboo board 2, and the upper decorative board 1 for a predetermined time to form a embryo board;

[0071] Step S6, the hot press moves upward to release the clamping member 62 and the jack 63, remove the embryo board, clean the connection glue squeezed out of the paving groove 61, release the clamping member 62 and the jack 63, remove the embryo board, and cut the embryo board according to the predetermined size to obtain the bamboo plywood. The edges of the cut bamboo plywood are coated with resin glue.

[0072] Wherein, the resin glue is insect-proof resin glue.

[0073] The planed bamboo fibers are dried and straightened, then added to the resin glue and stirred to obtain the connecting glue.

[0074] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A bamboo plywood, characterized in that: The invention comprises an upper decorative plate, a multi-layer bamboo plate and a lower decorative plate from top to bottom; and the manufacturing method of the bamboo plywood comprises: Step S1, cutting large-diameter bamboo into bamboo segments, milling off outer nodes and then longitudinally cutting into a plurality of arc-shaped bamboo strips, milling off inner nodes and steaming and softening, heating and pressurizing, unfolding the arc-shaped bamboo strips into a plane, and processing them into bamboo strips of equal thickness without bamboo green or bamboo yellow and with rough surfaces on each surface through double-sided planing, and collecting the bamboo fibers planed off; Step S2, heating and shaping bamboo strips of equal thickness in a mold and draining water to obtain dry bamboo strips; Step S3, putting the dry bamboo strips into a soaking tank, wherein the soaking tank has a cover plate, after the cover plate is installed, negative pressure is first applied to precipitate bubbles in the dry bamboo strips, and then resin glue is added into the soaking tank and pressurized until the resin glue penetrates into the dry bamboo strips, then the dry bamboo strips are taken out, and after drying, a bamboo strip having a glue film on the surface is formed; Step S4, using warp and weft strips to press and weave one by one, and the weft is eliminated without leaving any gaps to obtain a rough blank, wherein the strips in the longitude direction of the rough blank are longer than the rough blank itself and extend to the left and right sides of the rough blank; the strips in the latitude direction of the rough blank are longer than the rough blank itself and extend to the front and back sides of the rough blank; Step S5, laying the lower decorative board, the multi-layer rough blank, and the upper decorative board from bottom to top in the tensioning plate, the tensioning plate is rectangular, and a laying groove is opened on the tensioning plate, and a hot press is arranged above the laying groove; laying the upper and lower decorative boards on the laying groove, the four side edges of the tensioning plate are the left edge, the right edge, the front edge, and the rear edge, and the left edge, the right edge, the front edge, and the rear edge are respectively provided with stretching holes for the rough blank dry bamboo strips to pass through, the stretching holes of the left edge and the front edge are respectively provided with clamps, and the stretching holes of the right edge and the rear edge are respectively provided with lifting jacks Top; when laying the rough blank in the tensioning plate, the bamboo strips on the four sides of the rough blank pass through the stretching holes of the tensioning plate respectively, and the clamping parts on the left edge and the front edge and the jacks on the right edge and the rear edge clamp the bamboo strips extending out of the rough blank and stretch them to a predetermined tensile force and then fix them, and the bamboo strips of the rough blank are stretched to obtain a bamboo board; the lower surface of the bamboo board and the lower surface of the upper decorative board are coated with connecting glue respectively, and the connecting glue is obtained by mixing resin glue and bamboo fibers that are planed after drying and straightening; after the lower decorative board, the multi-layer bamboo board and the upper decorative board are laid, the hot press is started to press for a predetermined time to form a embryo board; Step S6: The hot press moves upward, the clamping parts and the jack are released, the embryo board is taken out, and the embryo board is cut according to a predetermined size to obtain bamboo plywood.

2. The bamboo plywood according to claim 1, characterized in that: After the cover is installed, negative pressure is first used to precipitate bubbles in the dry bamboo strips to determine whether the dry bamboo strips are broken or split. If so, the broken or split dry bamboo strips are screened out; then the immersion pool is pressurized until the resin glue penetrates into the dry bamboo strips, then the dry bamboo strips are taken out, and after air drying, bamboo strips with a glue film are formed on the surface of the dry bamboo strips.

3. The bamboo plywood according to claim 2, characterized in that: The jacks at the right edge and the rear edge clamp the bamboo strips extending from the right side and the rear side of the rough blank and stretch them to a predetermined tension to determine whether there are gaps between the bamboo strips in the longitude direction and between the bamboo strips in the latitude direction. If there are gaps, the positions of the bamboo strips are adjusted to fill the gaps and then fixed. The bamboo strips of the rough blank are stretched to obtain a bamboo board.

4. The bamboo plywood according to claim 1, characterized in that: The tensioning plate is also provided with a vibrating device. After the lower decorative board, the multi-layer bamboo board and the upper decorative board are paved, the vibrating device is used to vibrate the lower decorative board, the multi-layer bamboo board and the upper decorative board, and then the hot press is started to hot press the lower decorative board, the multi-layer bamboo board and the upper decorative board for a predetermined time to form a embryonic board.

5. The bamboo plywood according to claim 1, characterized in that: The edges of the cut bamboo plywood are coated with resin glue.

6. The bamboo plywood according to claim 1, characterized in that: The resin glue is insect-proof resin glue.

7. The bamboo plywood according to claim 1, characterized in that: Bamboo strips of equal thickness are heated and shaped in a mold and water is discharged to obtain dry bamboo strips, and the moisture content of the dry bamboo strips is less than 5%.

8. The bamboo plywood according to claim 1, characterized in that: The strips in the longitudinal direction of the rough blank are longer than the rough blank itself and extend out of the left and right sides of the rough blank, and the extended parts are provided with slots; the strips in the latitude direction of the rough blank are longer than the rough blank itself and extend out of the front and back sides of the rough blank, and the extended parts are provided with slots; The clamping parts at the left and front edges clamp the slots on the bamboo strips extending from the left and front sides of the rough blank, and the jacks at the right and rear edges clamp the slots on the bamboo strips extending from the right and rear sides of the rough blank, stretch them to a predetermined tension, and then fix them.

9. The bamboo plywood according to claim 1, characterized in that: The hot press moves upward, loosens the clamps and jacks, removes the embryonic board, and cleans the connecting glue squeezed out of the paving groove.

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