CN102352682B - Grooved solid wood middle board capable of resisting tile-like deformation and composite board with the grooved solid wood middle board - Google Patents

Abstract

The utility model provides a slot type wood medium plate and have composite sheet of this slot type wood medium plate, on the wood medium plate, the lower surface distributes saw cuts the slot of 30-90 degrees with the surface slope, can be along with the medium plate material density of different uses, hardness, the deformation degree destroys the inside stress of material and can suitably effectively adjust the inside stress of timber, give timber inflation or the regulation space of shrink when moist or dry, better guarantee the flattening of composite sheet surface and greatly improve the compliance with the contact surface, provide the cushioning effect when pressurized simultaneously, let the composite sheet receive pressure occasionally soft, elastic feel. The upper surface of the solid wood middle plate can be provided with an upper veneer and a panel in a matching way, and the lower surface can be provided with a lower veneer and a veneer or a moisture-proof bottom layer in a matching way. The two sides of vertical wood grain wood medium plate all are equipped with the cross grain veneer, because the difference of wood grain fibre contraction expansion direction, the wood grain fibre can pin down each other, even the composite sheet is when wet in high temperature and high humidity season, also can avoid the tile form that the composite sheet face produced to warp.

Description

Grooved solid wood middle board capable of resisting tile-like deformation and composite board with the grooved solid wood middle board

Technical field:

The invention relates to the technical field of solid wood composite boards, in particular to a grooved solid wood composite board which is anti-deformation and has a buffering effect.

Background technique:

Solid wood composite panels have been used in the field of interior decoration and furniture for a long time, especially in the field of wooden flooring. Based on the economy of material acquisition and use, the wooden floors currently used in the market are generally tongue-and-groove flooring. Among them, the solid wood multi-layer composite floor is gradually selected by consumers due to its low cost and small deformation. The growth direction of wood fibers and the hardness and density distribution of the wood body are uneven. When the dry humidity in the atmosphere changes greatly, the floor will expand due to moisture absorption, so that the assembled floor boards push each other, forming a depression in the middle of the floor surface, causing The surface of the floor is severely tiled, which affects the appearance and practicality.

In order to solve the above problems, the present inventor once proposed the utility model patent case of Chinese Patent No. CN03256151.2 "a kind of grooved solid wood composite floor", which is provided with grooves vertical to the floor surface on the upper and lower surfaces of the solid wood middle board. The groove effectively destroys the fiber growth direction of the wooden floor, so that the internal stress of the wooden floor body is reduced to the minimum. At the same time, the cut groove space can absorb the excess volume of the material increased by the swelling of the solid wood floor, reduce the pressure of wood swelling and the floor Push each other to solve the shingle situation on the board.

The above-mentioned patent case has basically achieved the practical effect required by the design during many years of implementation. However, it is still found that some wooden floors have partial deformation problems. After research, it is found that the internal stress of the wooden floors that the grooves on the vertical floor surface can destroy is limited, and there is still a need for improvement.

In addition, due to the characteristics of the material, this kind of wooden floor cannot provide better longitudinal cushioning effect, and it is relatively hard when the floor is stepped on. Although some construction units will add a layer of foaming material or cushioning material on the bottom of the wooden floor to improve its cushioning effect, but for thicker wooden floors, its effect is not obvious.

In addition, the application of composite panels with solid wood panels has been extended to the field of furniture and decoration, and its requirements for deformation are more stringent.

Invention content:

The problem to be solved by the present invention is to overcome some disadvantages in the prior art that the internal stress of the solid wood multi-layer composite board causes deformation of the composite board and poor cushioning effect when the surface of the composite board is pressed.

In order to achieve the above object, the technical solution of the present invention is to provide a grooved solid wood middle plate that can resist tile-like deformation, which is characterized in that: the surface of the solid wood middle plate is provided with an angle range greater than or equal to 30 degrees from the surface Grooves less than 90 degrees.

The angle range between the groove and the surface is greater than or equal to 30 degrees and less than or equal to 85 degrees.

The surface of the solid wood middle board is additionally provided with grooves with an angle of 90 degrees to the surface.

The groove is the first longitudinal groove on the upper surface of the solid wood middle plate.

The groove is the second longitudinal groove on the lower surface of the solid wood middle board.

The groove is the first transverse groove on the upper surface of the solid wood middle plate.

The groove is the second transverse groove on the lower surface of the solid wood middle board.

The grooves are the first longitudinal groove on the upper surface of the solid wood middle plate and the second longitudinal groove on the lower surface, and the first longitudinal groove and the second longitudinal groove of the solid wood middle plate are in the same direction or opposite directions set up.

The first longitudinal groove and the second longitudinal groove of the solid wood middle plate are arranged at intervals, the groove spacing of the first and second longitudinal grooves is 10-60mm, and the groove width of the first and second longitudinal grooves is 0.5-3mm, the depth of the first and second longitudinal grooves of the solid wood middle board is 20%-95% of the thickness of the solid wood middle board.

The solid wood middle board has longitudinal wood grain, and the thickness of the solid wood middle board is 5-50mm.

The present invention also proposes a composite board with a grooved solid wood middle board that can resist tile-like deformation as described above, and is characterized in that: the upper surface of the solid wood middle board is provided with an upper veneer, and the lower surface of the solid wood middle board There is a lower veneer, and the upper and lower veneers are horizontal wood grain.

A panel is arranged on the upper surface of the composite board, and the thickness of the panel is 0.05-10mm.

The panel is made of solid wood board, veneer, artificial board, decorative paper or melamine impregnated wear-resistant wood grain decorative paper.

The lower surface of the composite board is provided with a moisture-proof bottom layer.

The moisture-proof bottom layer is made of tin foil, aluminum foil, moisture-proof paper, color-printed cosmetic paper, floor shock-proof, moisture-proof and sound-insulating cushion film, elastic material cushion, wood-based board (density board), kraft paper, veneer or self-adhesive tape.

When in use, the distribution of the upper and lower surfaces of the solid wood middle board of the present invention corresponds to sawing longitudinal grooves greater than or equal to 30 degrees and less than 90 degrees, which can destroy the internal stress of the material according to the density, hardness, and degree of deformation of the middle board materials used, and can be moderately effective. Adjust the internal stress of the wood, give the wood expansion or contraction adjustment space when it is wet or dry, and better ensure the flatness of the floor surface. Different, the wood grain fibers will hold each other, even if the floor is damp in high temperature and high humidity seasons, it can avoid the advantages of tile-like deformation of the floor surface.

Description of drawings:

Fig. 1 is a structural exploded view of a preferred embodiment of the composite board with grooved solid wood middle board of the present invention.

FIG. 2 is an exploded schematic diagram of a preferred embodiment of the composite board with the grooved solid wood middle board and the moisture-proof bottom layer in FIG. 1 of the present invention.

Fig. 3 is a partial cross-sectional structural schematic diagram of the finished product of the preferred embodiment of the composite board with grooved solid wood middle board in Fig. 2 of the present invention.

Fig. 4 is an exploded schematic diagram of another preferred embodiment of the composite board with grooved solid wood middle board of the present invention.

Fig. 5 is a partial cross-sectional structure schematic diagram of the finished product of the preferred embodiment of the composite board with grooved solid wood middle board in Fig. 4 of the present invention.

Fig. 6 is an exploded schematic diagram of another preferred embodiment of the composite board with grooved solid wood middle board of the present invention.

FIG. 7 is an exploded schematic diagram of a preferred embodiment of the composite board with the grooved solid wood middle board and the moisture-proof bottom layer in FIG. 6 of the present invention.

Figures 8-10 are schematic diagrams of the end face structures of three preferred embodiments of grooved solid wood middle boards made into grooved boards according to the present invention.

11 to 15 are schematic diagrams of the end structures of five preferred embodiments of the grooved solid wood middle board of the present invention.

Detailed ways:

The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

Please refer to shown in Fig. 1, it is the structure exploded schematic diagram of a preferred embodiment of the composite board with grooved solid wood middle board of the present invention, shows that the present invention mainly comprises solid wood middle board 3 in this embodiment, and the solid wood middle board The upper surface is provided with a panel 1 and an upper veneer 2, and the lower surface of the solid wood middle board 3a is provided with a lower veneer 4, and the upper surface of the solid wood middle board 3a is provided with a first longitudinal groove 8a and a first transverse groove 9a , the lower surface is provided with a second longitudinal groove 6a and a second transverse groove 7a, the first longitudinal groove 8a on the upper surface of the solid wood middle board 3a and the second longitudinal groove 6a on the lower surface are inclined to the surface, which The angle range of inclination is greater than or equal to 30 degrees and less than 90 degrees; and the angle range of the first transverse groove 9a on the upper surface of the solid wood middle plate 3a and the second transverse groove 7a on the lower surface and the surface can be greater than or equal to 30 degrees Less than or equal to 90 degrees;

Fig. 2 is a structural exploded view of a preferred embodiment of a composite board with a grooved solid wood middle board in Fig. 1 of the present invention collocated with a moisture-proof bottom layer, and Fig. 3 is a composite board with a grooved solid wood middle board in Fig. 2 of the present invention The partial sectional structure schematic diagram of the finished product of preferred embodiment, wherein shows that composite plate bottom surface of the present invention can be provided with one deck moisture-proof bottom layer 5 (this moisture-proof bottom layer 5 can be the moisture-proof bottom film of thin film, also can be the moisture-proof bottom layer with certain thickness , In the description, the moisture-proof bottom layer is used for illustration), the moisture-proof bottom layer 5 is made of tin foil, aluminum foil paper, moisture-proof paper, color-printed cosmetic paper, floor shock-proof, moisture-proof and sound-insulating cushion film, elastic material cushion, wood-based board (density board), kraft paper, veneer or self-adhesive tape.

Shown in Fig. 4 is the structural exploded schematic diagram of another preferred embodiment of the composite board with the grooved solid wood middle board of the present invention, cooperates with Fig. 5 part sectional structural schematic diagram of finished product as can be seen, its overall structural configuration and Fig. 2, Fig. 3 It is the same as that shown in , except that the first longitudinal groove 8b on the upper surface of the wood middle plate 3b and the second longitudinal groove 6b on the lower surface are inclined in different directions. From this embodiment, it can be known that the first longitudinal groove 8b of the present invention The inclination directions of the longitudinal grooves and the second longitudinal grooves on the lower surface can be arranged in various combinations, and the first longitudinal grooves and the second longitudinal grooves are arranged in the same direction or in opposite directions.

Fig. 6 is a structural exploded schematic diagram of another preferred embodiment of a composite panel with a grooved solid wood middle panel in the present invention, and Fig. 7 is a structural decomposition of a preferred embodiment of the composite panel in Fig. 6 of the present invention with a moisture-proof bottom layer Schematic diagram, its overall structural configuration is the same as that shown in Fig. 2 and Fig. 3, except that the upper surface and lower surface of the real wood middle board 3c may not be provided with transverse grooves.

The upper surface of the solid wood middle board of the present invention has a grooved solid wood middle board is provided with a first longitudinal groove and a first transverse groove, and the lower surface of the solid wood middle board is provided with a second longitudinal groove and a second transverse groove. Grooves, these grooves can destroy the internal stress of the material according to the density, hardness and deformation degree of the middle board material used, and can moderately and effectively adjust the internal stress of the wood, and give the wood expansion or contraction adjustment space when it is wet or dry, Better ensure the flatness of the surface of the composite board; the angle range between these longitudinal grooves and the surface of the solid wood middle board is greater than or equal to 30 degrees and less than 90 degrees, which is different from the grooves perpendicular to the surface of the existing solid wood middle board. On the one hand, when the depth of the grooves accounts for the same proportion of the thickness of the solid wood middle board 3, opening the grooves obliquely can cut more fibers, so that the internal stress of the composite board body is minimized; on the other hand, the grooves opened obliquely It can provide the cushioning effect when the surface of the composite board is under pressure, and it has a soft texture when the floor is stepped on. When the angle between the groove and the surface of the solid wood middle board is less than 90 degrees, it can provide the buffering effect when the surface of the composite board is under pressure. , the smaller the inclination angle and the higher the groove density, the better it can be damaged, the better the adjustment of the deformation internal stress of the solid wood mid-board material and the better the cushioning effect when the composite board surface is compressed.

The depth of the first longitudinal groove and the second longitudinal groove of the solid wood midboard of the present invention is 20%-95% of the thickness of the solid wood midboard. The upper and lower veneers 2 and 4 are horizontal wood grain, the panel 1 is longitudinal wood grain, the thickness of the upper and lower veneer 2 and 4 is 0.5-8mm, the thickness of panel 1 is 0.05-10mm, and the thickness of the solid wood middle plate is 5-50mm. Panel 1 is made of solid wood board, veneer, wood-based board, decorative paper or melamine impregnated wear-resistant wood grain decorative paper with a thickness of 0.10.05-10mm, and the two sides of the solid wood middle board can be respectively provided with grooves for assembly.

The solid wood middle board of the present invention has the composite board of groove type solid wood middle board. In order to provide general users with a feeling of actual pedal cushioning, the preferred angle range between the grooves and the surface of the solid wood middle plate is greater than or equal to 30 degrees and less than or equal to 85 degrees.

And the first longitudinal groove and the second longitudinal groove of the solid wood middle board of the composite board with the groove type solid wood middle board of the present invention adopt the structure that is inclined with the surface, and the first transverse groove and the second transverse groove are then The structure of the existing vertical surface can be adopted, and the required effect of the present invention can also be achieved.

Figures 8 to 10 are schematic diagrams of the end face structures of three preferred embodiments of grooved solid wood panels of the present invention made into grooved panels, wherein it can be clearly seen that the solid wood panels 3d, 3e, and 3f of the present invention are on the upper surface. The first longitudinal grooves 8d, 8e, 8f and the second longitudinal grooves 6d, 6e, 6f on the lower surface can have various angle changes and different direction changes.

Figures 11 to 15 are schematic diagrams of the end structures of five preferred embodiments of the grooved solid wood middle board of the present invention, wherein the first longitudinal groove on the upper surface of the solid wood middle board of the present invention and the second longitudinal groove on the lower surface are shown Not only can there be various angle changes and different direction changes, but also the present invention can be used in conjunction with the inclined longitudinal grooves on the surface of the solid wood middle board and the vertical longitudinal grooves on the surface of the existing solid wood middle board. Also can reach practical effect of the present invention.

The present invention has the manufacturing method of the composite board of groove type solid wood middle board as follows: a, after the solid wood middle board is prepared, saw the first longitudinal groove and the second longitudinal groove respectively on the upper and lower surfaces of the solid wood middle board, and then Saw the first transverse groove and the second transverse groove on the upper and lower surfaces of the solid wood middle board; b. Apply cold-pressed glue or hot-pressed glue on the upper and lower surfaces of the solid wood middle board, The lower veneer is respectively pasted on the upper and lower surfaces of the solid wood middle board, and the three-layer board is laminated by cold pressing with a press coated with cold-press glue or by pre-pressing and then hot-pressing with hot-press glue; c. Apply cold-press glue or hot-press glue on the surface of the upper veneer, attach the panel to the surface of the upper veneer, and use the cold-press glue-coated press to cold-press or use hot-press glue to pass through the pre-press Hot pressing with a hot press to make the panel and the upper veneer bond; d. Saw and divide the composite panel after the above-mentioned laminated panel, and open grooves on the edge of the composite panel; e. Paint the composite panel, and then follow the composite panel. The quality of the paint surface of the board requires a photo inspection; f, the bottom of the lower veneer is pasted with a moisture-proof bottom layer, and finally packed and put into storage. Wherein, the angle range of the first longitudinal groove and the first transverse groove is greater than or equal to 30 degrees and less than 90 degrees, and the angle range of the second longitudinal groove and the second transverse groove is greater than or equal to 30 degrees and less than 90 degrees. The above-mentioned angle refers to the angle between the upper and lower surfaces of the solid wood middle plate and each groove, the first longitudinal groove and the second longitudinal groove are arranged in the same direction or oppositely, each of the first longitudinal groove The grooves are arranged in the same direction or in opposite directions, the grooves in the second longitudinal grooves are arranged in the same direction or in opposite directions, and the first longitudinal grooves and the second longitudinal grooves are arranged in the same direction or in opposite directions.

In step a, the solid wood middle board adopts artificially planted forest materials with a thickness of 5-50mm and a dried moisture content lower than 12%. Generally, fast-growing fir, poplar, pine, eucalyptus or birch are used, and the above-mentioned materials are cut off for backup. For use, the first longitudinal groove and the second longitudinal groove of the solid wood middle plate are arranged at intervals, the groove spacing of the first and second longitudinal grooves is 15-60mm, and the groove width of the first and second longitudinal grooves 0.5-3mm, the groove depth of the first and second longitudinal grooves is 20%-95% of the thickness of the solid wood middle plate; the first transverse groove and the second transverse groove of the solid wood middle plate are arranged at intervals, the second 1. The groove spacing of the second transverse groove is 10-80cm, the groove width of the first and second transverse grooves is 0.5-3mm, and the groove depth of the first and second transverse grooves is the thickness of the solid wood middle plate 20%-80% of the 20%-80%, and finally the sawn solid wood middle board with horizontal and vertical grooves is assembled, and the length of the assembled board is 90-2650cm, and the width is 90-135cm. In step b, the upper and lower surfaces of the solid wood mid-board are coated with a double-sided glue coating machine, the coating amount of cold pressing glue is 100-200g/m ² , and the coating amount of hot pressing glue is 120-220g/m ² , The pressure of cold pressing is 6-15kg/cm2, the time of cold pressing is 10-60 minutes, the ambient temperature of cold pressing is 10-35℃, the pressure of hot pressing is 6-15kg/ ^cm2 , and the time of hot pressing is 5-20 minutes , the hot pressing temperature is 100-125 degrees Celsius, the upper veneer, the solid wood middle panel, and the lower veneer are laminated and then sanded on both sides to determine the thickness, so that the thickness of the panel is uniform and the surface of the panel is smooth and clean.

In step c, the surface of the upper veneer is coated with a single-side glue coating machine, the coating amount of cold pressing glue is 100-200g/m ² , the coating amount of hot pressing glue is 120-220g/m ² , and the coating amount of cold pressing glue is 120-220g/m 2 The pressure is 6-15kg/cm ² , the cold pressing time is 15-60 minutes, the hot pressing pressure is 6-15kg/cm ² , the hot pressing time is 5-20 minutes, the hot pressing temperature is 100-125 degrees Celsius, and the thickness of the panel is 0.05-10mm solid wood board, veneer, artificial board, decorative paper or melamine impregnated wear-resistant wood grain decorative paper. In step f, the moisture-proof bottom layer is made of tin foil, aluminum foil paper, moisture-proof paper, color-printed cosmetic paper, floor shock-proof, moisture-proof and sound-insulating cushion film, elastic material cushion, wood-based board (density board), kraft paper, veneer or self-adhesive tape.

The difference and the improvement of the present invention as the use of the floor and the existing floor technology are illustrated below by the attached table:

Schedule 1

Schedule 2

From the contents of attached table 1 and attached table 2, it can be concluded that the composite board with grooved solid wood middle board of the present invention is used as a floor not only with low production cost, convenient paving, simple process flow, but also has the advantages of moisture resistance and drying resistance. The advantages that solid wood flooring does not have are more in line with the needs of geothermal floor heating. It also has the foot feel and visual effects of general solid wood flooring, and the formaldehyde content is much lower than ordinary solid wood composite flooring. It can be said that the present invention has grooved solid wood middle panels The advanced composite board combines the advantages of solid wood flooring and ordinary solid wood composite flooring, and opens up a new field of solid wood composite flooring.

Example 1

Below the lower veneer 4, a moisture-proof bottom layer 5 made of floor moisture-proof paper, shockproof, moisture-proof and sound-insulating cushion film, elastic material cushion, etc. can be provided, which can effectively isolate the direct contact between the bottom surface of the floor and the ground moisture, and can effectively prevent the floor Moisture deformation, decay and other situations occur, and the floor's moisture-proof, anti-corrosion, sound-absorbing and shock-proof effects are greatly improved. The sawn groove destroys the irregular fiber direction of the floor wood, so as to minimize the internal stress and deformation of the wooden floor. In order to make the floor more flat and obedient without warping, and to improve the moisture inside the floor due to dry climate or high temperature direct sunlight A large amount of loss will cause the separation of the wooden floor and the cracking of the floor surface. Through the vertical and horizontal sawing grooves interlaced up and down on the solid wood middle plate and the bonding and reorganization of the upper and lower surfaces and the horizontal wood veneers, the wood fibers are mutually restrained, which can avoid Wood floor joints and cracks in the floor deck. The structure design of the present invention is reasonable, except that the panel 1 uses more expensive raw materials, the bottom of the other lower veneer 4 can use artificially planted fast-growing forest veneer or the moisture-proof bottom layer 5 material, the use of materials is more environmentally friendly, and the comprehensive utilization rate is higher. The bottom layer is made of 5 materials, and the use of glue is reduced by 50%-70% compared with solid wood multi-layer composite flooring. It is environmentally friendly, low formaldehyde, moisture-proof, anti-corrosion and anti-deformation. The production process is shortened and the manufacturing cost is lower. The popular heating floor in the market requires high-quality and high-standard flooring (the bottom of the floor withstands a high temperature of about 50-60 degrees Celsius for a long time in winter, and the material shrinks after drying for a long time, and the heat and humidity in summer causes the material to expand due to moisture).

Example 2

The solid wood middle board is made of fir board with a length of 930mm, a width of 135mm, a thickness of 12mm, and a dried moisture content of less than 12%. The longitudinal groove and the second longitudinal groove, the first longitudinal groove and the second longitudinal groove are arranged in opposite directions, and then the first transverse groove and the second transverse groove are sawed respectively on the upper and lower surfaces of the solid wood middle board, The first longitudinal groove and the second longitudinal groove of the solid wood middle plate are arranged at intervals from each other, the groove distance from the (convex) side of the solid wood middle plate to the first groove is 20mm, and the first and second longitudinal grooves The groove spacing is 20mm, and the groove width of the first and second longitudinal grooves is 1mm. The groove depth of the first and second longitudinal grooves is 80% of the thickness of the solid wood middle plate; the first transverse groove of the solid wood middle plate and the second transverse grooves are spaced apart from each other, the groove spacing of the first and second transverse grooves is 20cm, the groove width of the first and second transverse grooves is 1mm, and the groove depth of the second transverse grooves is 60% of the thickness of the solid wood middle board, and finally the solid wood middle board with horizontal and vertical grooves is assembled into a large board with a jigsaw stringing machine. Next, use a double-sided gluing machine to coat the upper and lower surfaces of the solid wood mid-board. The amount of hot-press glue coating is 200g/m ² , and then attach the upper and lower veneers to the solid wood mid-board respectively. After the upper and lower surfaces, put it into the hydraulic pre-pressing machine for cold pressing, the pressure of cold pressing is 10kg/cm ² , the cold pressing time is 40 minutes, the ambient temperature of cold pressing is 25℃±5℃, and the pressure of hot pressing is 12kg/cm ² , hot-pressing time 10 minutes, hot-pressing temperature 110 degrees Celsius, double-sided sanding to determine the thickness of the upper veneer, solid wood middle panel, and lower veneer three-layer board body, so that the thickness of the board surface is uniform and smooth bright and clean. The surface of the upper veneer is coated with a single-sided glue coating machine. The coating amount of the cold pressing glue is 180g/m ² , the pressure of the cold pressing is 12kg/cm ² , the cold pressing time is 30 minutes, and the ambient temperature of the cold pressing work is 25°C±5°C, the panel is made of solid wood with a thickness of 2mm. Then carry out floor stripping, floor opening and groove, floor UV paint coating, and then inspect according to the quality requirements of the floor paint surface, and finally paste the floor moisture-proof bottom layer on the bottom layer of the floor. The material can be tin foil, aluminum foil paper, moisture-proof paper, color printing makeup Paper, floor shock-proof, moisture-proof and sound-proof cushion film, elastic material cushion, artificial board (density board), kraft paper, veneer, self-adhesive tape, etc., so that the bottom of the floor can better and effectively achieve moisture-proof, anti-corrosion, shock-proof and sound insulation effects. At the same time, the color printing cosmetic paper can print various beautiful wood grains on the bottom of the floor, and can also print trademarks, manufacturer names, patent numbers, anti-counterfeiting marks, and product manufacturing dates on the moisture-proof bottom layer, so that consumers can see the manufacturer at a glance. Produce companies to achieve better product promotion effects and prevent product counterfeiting.

Claims (11)

1. A grooved solid wood middle plate capable of resisting tile-like deformation, characterized in that: the solid wood middle plate is a longitudinal wood grain, and the surface of the solid wood middle plate is provided with an angle range greater than or equal to 30 degrees with the surface Grooves less than or equal to 85 degrees, the grooves are the first longitudinal groove on the upper surface of the solid wood middle board and the second longitudinal groove on the lower surface, the first longitudinal groove and the second longitudinal groove of the solid wood middle board The grooves are arranged at opposite intervals, and the depth of the first and second longitudinal grooves is 20%-95% of the thickness of the solid wood middle plate. 2. The groove-type solid wood middle board capable of resisting tile-like deformation according to claim 1, characterized in that: the surface of the solid wood middle board is additionally provided with a groove at an angle of 90 degrees to the surface. 3. The grooved solid wood middle plate capable of resisting tile-like deformation according to claim 2, wherein the groove is the first transverse groove on the upper surface of the solid wood middle plate. 4. The grooved solid wood mid-panel capable of resisting tile-like deformation according to claim 2, wherein the groove is the second transverse groove on the lower surface of the solid wood mid-panel. 5. The grooved solid wood middle plate capable of resisting tile-shaped deformation according to claim 1, characterized in that: the groove spacing of the first and second longitudinal grooves is 10-60 mm, and the first and second longitudinal grooves The groove width of the groove is 0.5-3mm. 6 . The grooved solid wood middle board capable of resisting tile-like deformation according to claim 1 , wherein the thickness of the solid wood middle board is 5-50 mm. 7 . 7. A composite panel with a grooved solid wood middle plate capable of resisting tile-like deformation as claimed in any one of claims 1, 2, 5, and 6, wherein the upper surface of the solid wood middle plate is set There is an upper veneer, and the lower surface of the solid wood middle plate is provided with a lower veneer, and the upper and lower veneers are horizontal wood grain. 8 . The composite board with a grooved solid wood middle board capable of resisting tile-shaped deformation according to claim 7 , wherein a panel is provided on the upper surface of the composite board, and the thickness of the panel is 0.05-10 mm. 9. The composite panel with a grooved solid wood middle panel that can resist tile-like deformation according to claim 8, wherein the panel is decorated with solid wood board, veneer, artificial board, decorative paper or melamine-impregnated wear-resistant wood grain Paper. 10. The composite board with a grooved solid wood middle board capable of resisting tile-shaped deformation according to claim 7, characterized in that: the lower surface of the composite board is provided with a moisture-proof bottom layer. 11. The composite board with a grooved solid wood middle board that can resist tile-like deformation according to claim 10, characterized in that: tin foil, aluminum foil paper, moisture-proof paper, color-printed cosmetic paper, floor shock-proof, moisture-proof and sound-insulating mat are used for the bottom layer of moisture-proof Membrane, elastic material underlayment, wood-based panel, kraft paper, veneer or self-adhesive tape.