Hollow environment-friendly wood decorative plate and preparation method thereof

Abstract

The invention discloses a hollow environment-friendly wood decorative plate and a preparation method thereof, and belongs to the technical field of decorative plates. A hollow environment-friendly wood decorative board comprises a wood decorative board body and a gypsum laminate, a steel bar keel is arranged below the gypsum laminate, and the steel bar keel is of a concave structure. In order to solve the problems that when an existing wood decorative plate is used in cooperation with a gypsum board, the gypsum board is in direct contact with a wall surface or the ground, so that the gypsum board is rubbed when subjected to external pressure, and once a surface waterproof layer is damaged, an internal gypsum structure is in contact with water, the strength of the laminate is reduced. The surface of the pressure bearing plate is designed into a triangular structure, and the laminate and the steel bar keel can be directly engaged and fixed by virtue of the keel bracket, so that external force can be effectively dispersed, and the surface of the gypsum board is protected from being easily broken or falling off by uniformly transmitting stress in an earthquake or vibration environment and avoiding stress concentration.

Description

Technical Field

[0001] The present invention relates to the technical field of decorative plates, in particular to a hollow environmentally friendly wooden decorative plate and a preparation method thereof. Background Art

[0002] Wood decorative board is a high-grade decorative board made by using natural tree species decorative veneer or artificial wood decorative veneer through precision cutting or rotary cutting to make thin wood slices. It is attached to the base material and made by advanced gluing technology and hot pressing.

[0003] As a surface decoration material, decorative boards cannot be used alone. They can only be reasonably utilized by being pasted on substrate boards of a certain thickness and strength, such as core boards, multi-layer plywood, medium-density fiberboards and particleboards.

[0004] When existing wooden decorative panels are used in conjunction with gypsum boards, the gypsum boards are in direct contact with the wall or floor, which can cause friction when the gypsum boards are subjected to external pressure. Once the surface waterproof layer is damaged, the internal gypsum structure comes into contact with moisture, which can cause the strength of the laminate to decrease. Summary of the Invention

[0005] The purpose of the present invention is to provide a hollow environmentally friendly wooden decorative board and a preparation method thereof. By designing the pressure-bearing board surface into a triangular structure, the layer board and the steel keel can be directly engaged and fixed with the help of the keel bracket, which can effectively disperse external forces, avoid stress concentration by uniformly transmitting stress in an earthquake or vibration environment, and protect the gypsum board surface from cracking or falling off, thereby reducing the risk of cracking and dislocation of the gypsum board, and can solve the problems in the prior art.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a hollow environmentally friendly wooden decorative board, comprising a wooden decorative board and a gypsum layer board, a steel keel is arranged under the gypsum layer board, wherein the steel keel is arranged as a concave structure, and a plurality of positioning screw holes are arranged on the surface of the steel keel, and an outer decorative surface is provided on the outer surface of the wooden decorative board, wherein the two sides of the wooden decorative board are respectively provided with integrally formed mortise piles and mortise buckles.

[0007] Furthermore, the gypsum layer board includes a pressure-bearing board surface and a composite board surface, wherein the pressure-bearing board surface is arranged as a triangular structure, and a plurality of expansion openings are arranged inside the pressure-bearing board surface, and the expansion openings extend through and extend to the two side surfaces of the expansion openings. The pressure-bearing board surface is arranged as a triangular structure. The triangle has natural geometric stability and can effectively disperse external forces. In an earthquake or vibration environment, the triangular structure uniformly transmits stress to avoid stress concentration, protects the surface of the gypsum board from cracking or falling off, reduces distortion or sinking of the frame, and thereby reduces the risk of cracking of the gypsum board and dislocation of joints.

[0008] Furthermore, a filling groove is provided inside the composite board surface, and the composite board surface is bonded to the wood veneer board by adhesive. A plurality of expansion openings are provided inside the pressure-bearing board surface. In a humid environment, the design of the expansion openings can prevent the frame from expanding and deforming, which indirectly causes the gypsum board to become damp and warp. Filling the filling groove with sound insulation cotton or thermal insulation material can enhance the acoustic and thermal performance of the gypsum board wall.

[0009] Furthermore, the outer surface of the composite board is provided with a keel bracket, and the gypsum layer board is connected to the steel keel through the keel bracket. The triangular support may change the spacing standard of the traditional keel, and the fixing point of the gypsum board needs to be re-planned. With the help of the keel bracket, the layer board and the steel keel can be directly engaged and fixed to avoid screws being hollow or the edge of the board being suspended in the air. At the same time, a rubber pad is added between the keel bracket and the steel keel to prevent friction between the steel keel and the layer board structure and damage.

[0010] A method for preparing a hollow environmentally friendly wooden decorative board comprises the following steps:

[0011] Step 1: Select β-hemihydrate gypsum, add wood pulp fiber to improve crack resistance, add retarder and waterproofing agent to adjust the performance, and set the water-cement ratio at 1:60-80 to ensure the fluidity of the slurry;

[0012] Step 2: Dry mix gypsum powder, fiber and modifier in proportion, add water and stir until uniform slurry, stir for 3-5 minutes, and control the slurry density at 1.2-1.5g / cm 3 ;

[0013] Step 3: Pre-treat the mold, spray the release agent, lay the bottom reinforcement mesh cloth, inject the slurry into the mold, vibrate and exhaust, and then scrape the surface flat. The initial setting time is 15-20 minutes, and the final setting time of gypsum is about 30-40 minutes.

[0014] Let it stand for 1-2 hours until the gypsum is completely hardened, then put it into a drying kiln at 60-80℃ and dry it for 12-24 hours. The moisture content after drying shall not be higher than 5%;

[0015] Step 4: Use a punching machine to punch holes in the formed gypsum layer board mold to form expansion openings 2011 and filling slots 2021. Then use a sanding machine to smooth the surface of the gypsum substrate to a roughness of Ra ≤ 3.2 μm. Then, perform an electrostatic dust removal operation on the surface to ensure that there are no impurities on the bonding surface.

[0016] Step 5: Apply adhesive to the composite board surface of the gypsum laminate and the back of the wood veneer board, with a coating amount of 150-200g / m 2, let it stand for 3-5 minutes to make the adhesive semi-dry, the hot pressing equipment temperature is 80-100℃, the pressure is 0.5-1.0MPa, the time is 5-8min, and after unloading the pressure, cold press and shape for 10-15min to prevent deformation.

[0017] Furthermore, in the step 2, 10%-15% of hollow glass microspheres are added to reduce the density of the gypsum board.

[0018] Furthermore, in step 4, the distance between the expansion opening inside the gypsum layer board and the surface is not less than 5 mm, and a honeycomb panel is provided inside the filling groove.

[0019] Furthermore, in step five, the adhesive is environmentally friendly polyurethane, which is used to bond the plaster to the wood veneer.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention adopts a triangular structure for the pressure-bearing plate surface. The triangle has a natural geometric stability and can effectively disperse external forces. In earthquake or vibration environments, the triangular structure evenly transmits stress, avoids stress concentration, protects the gypsum board surface from cracking or falling off, reduces distortion or sinking of the frame, and thus reduces the risk of gypsum board cracking and joint misalignment.

[0022] 2. In this invention, the internal surface of the pressure-bearing plate is provided with multiple expansion openings. In a humid environment, the design of the expansion openings can prevent the frame from expanding and deforming, which indirectly causes the gypsum board to become damp and warp. Filling the filling slots with sound insulation cotton or thermal insulation material can enhance the acoustic and thermal performance of the gypsum board wall.

[0023] 3. The present invention uses β-hemihydrate gypsum, which wins with its economy and convenient process. It is the mainstream choice for ordinary gypsum boards. By designing the pressure-bearing board surface into a triangular structure, the layer boards and the steel keels can be directly engaged and fixed with the help of keel brackets, avoiding screw holes or hanging board edges. At the same time, rubber pads are added between the keel brackets and the steel keels to prevent friction and damage between the steel keels and the layer board structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall front view of the present invention;

[0025] Figure 2 It is an overall side view of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0028] In the figure: 1. Wood veneer; 2. Gypsum layer; 3. Steel keel; 101. Exterior finish; 102. Mortise and tenon; 103. Mortise and tenon; 201. Pressure-bearing board surface; 202. Composite board surface; 203. Keel bracket; 2011. Expansion opening; 2021. Filling slot; 301. Positioning screw hole. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] To solve the problem that when existing wooden decorative panels are used in conjunction with gypsum boards, the gypsum boards are in direct contact with the wall or floor, which causes friction when the gypsum boards are subjected to external pressure. Once the surface waterproof layer is damaged, the internal gypsum structure will come into contact with moisture, which will cause the strength of the laminate to decrease. Please refer to Figure 1-4 , this embodiment provides the following technical solutions:

[0031] A hollow environmentally friendly wooden decorative board comprises a wooden decorative board 1 and a gypsum layer board 2, wherein a steel keel 3 is arranged below the gypsum layer board 2, wherein the steel keel 3 is arranged as a concave structure, and a plurality of positioning screw holes 301 are arranged on the surface of the steel keel 3, and an outer decorative surface 101 is arranged on the outer surface of the wooden decorative board 1, wherein two sides of the wooden decorative board 1 are respectively provided with an integrally formed tenon pile 102 and tenon buckle 103, and the gypsum layer board 2 comprises a pressure-bearing board surface 201 and a composite board surface 202, wherein the pressure-bearing board surface 201 is arranged as a triangular structure, and the triangle has natural geometric stability and can effectively disperse external force. In an earthquake or vibration environment, the triangular structure uniformly transmits stress to avoid stress concentration, protects the surface of the gypsum board from cracking or falling off, reduces the distortion or sinking of the frame, and thus reduces the cracking and joints of the gypsum board. To reduce the risk of misalignment, the pressure plate surface 201 is provided with a plurality of expansion openings 2011 inside, and the expansion openings 2011 extend through and extend to the surfaces on both sides of the expansion openings 2011. In a humid environment, the design of the expansion openings 2011 can prevent the frame from expanding and deforming, which indirectly causes the gypsum board to be damp and warped. The composite board surface 202 is provided with a filling groove 2021 inside, and the triangular frame is filled with sound insulation cotton or thermal insulation material to enhance the acoustic and thermal performance of the gypsum board wall. The composite board surface 202 is bonded to the wood veneer board 1 by adhesive, and the outer surface of the composite board surface 202 is provided with a keel bracket 203, and the gypsum layer board 2 is connected to the steel keel 3 through the keel bracket 203. The triangular support may change the spacing standard of the traditional keel, and the fixing point of the gypsum board needs to be re-planned to avoid screws being hollow or the edge of the board being suspended in the air.

[0032] Example 1:

[0033] A method for preparing a hollow environmentally friendly wooden decorative board comprises the following steps:

[0034] Step 1: Select β-hemihydrate gypsum, add wood pulp fiber to improve crack resistance, add retarder and waterproofing agent to adjust the performance, and use a water-cement ratio of 1:60 to ensure the fluidity of the slurry;

[0035] Step 2: Dry mix gypsum powder, fiber and modifier in proportion, add water and stir until uniform slurry is formed. Stir for 3 minutes and control the slurry density at 1.2g / cm 3 , adding 10% hollow glass microspheres to reduce the density of gypsum board;

[0036] Step 3: Pre-treat the mold, spray the release agent, lay the bottom reinforcement mesh cloth, inject the slurry into the mold, vibrate and exhaust, and then scrape the surface flat. The initial setting time is 15 minutes, and the final setting time of gypsum is about 30 minutes.

[0037] Let it stand for 1 hour until the gypsum is completely hardened, then put it into a drying kiln at 80℃ and dry it for 12 hours. The moisture content after drying shall not be higher than 5%;

[0038] Step 4: Use a punching machine to punch holes in the mold of the formed gypsum layer board 2 to form expansion openings 2011 and filling slots 2021. Then use a sander to process the surface of the gypsum substrate until it is flat with a roughness Ra ≤ 3.2 μm. Then perform an electrostatic dust removal operation on the surface to ensure that there are no impurities on the bonding surface. The distance between the expansion opening 2011 inside the gypsum layer board 2 and the surface is not less than 5 mm. The filling slots 2021 are provided with honeycomb panels inside.

[0039] Step 5: Apply adhesive to the composite board surface 202 of the gypsum layer board 2 and the back of the wood veneer board 1, with a coating amount of 150g / m 2 , let it stand for 3 minutes to make the adhesive semi-dry, the hot pressing equipment temperature is 80℃, the pressure is 0.5MPa, the time is 5min, and after unloading the pressure, cold press and shape for 10 minutes to prevent deformation. The adhesive uses environmentally friendly polyurethane and is used for bonding gypsum and wood veneer.

[0040] Example 2:

[0041] A method for preparing a hollow environmentally friendly wooden decorative board comprises the following steps:

[0042] Step 1: Select β-hemihydrate gypsum, add wood pulp fiber to improve crack resistance, add retarder and waterproofing agent to adjust the performance, and use a water-cement ratio of 1:80 to ensure the fluidity of the slurry;

[0043] Step 2: Dry mix gypsum powder, fiber and modifier in proportion, add water and stir until the slurry is uniform. Stir for 3-5 minutes and control the slurry density at 1.5g / cm 3 ;

[0044] Step 3: Pre-treat the mold, spray the release agent, lay the bottom reinforcement mesh cloth, inject the slurry into the mold, vibrate and exhaust, and then scrape the surface flat. The initial setting time is 20 minutes, and the final setting time of gypsum is 40 minutes;

[0045] Let it stand for 2 hours until the gypsum is completely hardened, then put it into a drying kiln at 80℃ and dry it for 24 hours. The moisture content after drying shall not be higher than 5%;

[0046] Step 4: Use a punching machine to punch holes in the mold of the formed gypsum layer board 2 to form expansion openings 2011 and filling slots 2021. Then use a sander to process the surface of the gypsum substrate until it is flat with a roughness Ra ≤ 3.2 μm. Then perform an electrostatic dust removal operation on the surface to ensure that there are no impurities on the bonding surface. The distance between the expansion opening 2011 inside the gypsum layer board 2 and the surface is not less than 5 mm. The filling slots 2021 are provided with honeycomb panels inside.

[0047] Step 5: Apply adhesive to the composite board surface 202 of the gypsum layer board 2 and the back of the wood veneer board 1, with a coating amount of 150g / m 2 , let it stand for 3 minutes to make the adhesive semi-dry, the hot pressing equipment temperature is 100℃, the pressure is 1.0MPa, the time is 8min, and after unloading the pressure, cold press and shape for 15 minutes to prevent deformation. The adhesive uses environmentally friendly polyurethane and is used for bonding gypsum and wood veneer.

[0048] Example 3:

[0049] A method for preparing a hollow environmentally friendly wooden decorative board comprises the following steps:

[0050] Step 1: Select α-high-strength gypsum, add wood pulp fiber to improve crack resistance, add retarder and waterproofing agent to adjust the performance, and use a water-cement ratio of 1:60 to ensure the fluidity of the slurry;

[0051] Step 2: Dry mix gypsum powder, fiber and modifier in proportion, add water and stir until uniform slurry is formed. Stir for 3 minutes and control the slurry density at 1.2g / cm 3 , adding 10% hollow glass microspheres to reduce the density of gypsum board;

[0052] Step 3: Pre-treat the mold, spray the release agent, lay the bottom reinforcement mesh cloth, inject the slurry into the mold, vibrate and exhaust, and then scrape the surface flat. The initial setting time is 15 minutes, and the final setting time of gypsum is about 30 minutes.

[0053] Let it stand for 1 hour until the gypsum is completely hardened, then put it into a drying kiln at 80℃ and dry it for 12 hours. The moisture content after drying shall not be higher than 5%;

[0054] Step 4: Use a punching machine to punch holes in the mold of the formed gypsum layer board 2 to form expansion openings 2011 and filling slots 2021. Then use a sander to process the surface of the gypsum substrate until it is flat with a roughness Ra ≤ 3.2 μm. Then perform an electrostatic dust removal operation on the surface to ensure that there are no impurities on the bonding surface. The distance between the expansion opening 2011 inside the gypsum layer board 2 and the surface is not less than 5 mm. The filling slots 2021 are provided with honeycomb panels inside.

[0055] Step 5: Apply adhesive to the composite board surface 202 of the gypsum layer board 2 and the back of the wood veneer board 1, with a coating amount of 150g / m 2 , let it stand for 3 minutes to make the adhesive semi-dry, the hot pressing equipment temperature is 80℃, the pressure is 0.5MPa, the time is 5min, and after unloading the pressure, cold press and shape for 10 minutes to prevent deformation. The adhesive uses environmentally friendly polyurethane and is used for bonding gypsum and wood veneer.

[0056] In combination with Examples 1-3, the following table is obtained:

[0057] Flexural strength Laminate density Waterproof grade Raw material costs Example 1 ≥9MPa <![CDATA[0.9g / cm 3 ]]> A-level Low Example 2 ≥8MPa <![CDATA[0.6g / cm 3 ]]> A-level Low Example 3 ≥9MPa <![CDATA[1.2g / cm 3 ]]> A-level high

[0058] As can be seen from the table above, α-high-strength gypsum focuses on high strength, high density, and excellent durability, making it suitable for scenarios with stringent performance requirements, but it is relatively expensive. β-hemihydrate gypsum, favored for its affordability and ease of processing, is the mainstream choice for ordinary gypsum board. However, it requires modification to enhance its functionality. Therefore, the pressure-bearing board surface 201 adopts a triangular structure design. Leveraging the natural geometric stability of triangles, it effectively disperses external forces. In earthquakes or vibration environments, the triangular structure evenly transmits stress, avoiding stress concentration and protecting the gypsum board surface from cracking or peeling. This reduces distortion or sinking of the frame, thereby reducing the risk of cracking and joint misalignment in the gypsum board. Furthermore, the keel bracket allows direct engagement and fixation between the shelving and steel keel, preventing screw holes or overhanging of the board edges. Rubber pads are added between the keel bracket and the steel keel to prevent damage from friction between the steel keel and the shelving structure. The expansion opening 2011 design prevents frame expansion and deformation, which could indirectly cause moisture and warping of the gypsum board.

[0059] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0060] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A hollow environmentally friendly wooden decorative board, characterized in that: The invention comprises a wood veneer board (1) and a gypsum layer board (2), wherein a steel keel (3) is provided below the gypsum layer board (2), wherein the steel keel (3) is provided as a concave structure, and a surface of the steel keel (3) is provided with a plurality of positioning screw holes (301), and an outer surface (101) is provided on the outer surface of the wood veneer board (1), wherein two sides of the wood veneer board (1) are respectively provided with an integrally formed mortise pile (102) and a mortise buckle (103).

2. The hollow environmentally friendly wooden decorative board according to claim 1, characterized in that: The gypsum layer board (2) comprises a pressure-bearing board surface (201) and a composite board surface (202), wherein the pressure-bearing board surface (201) is arranged as a triangular structure, and a plurality of expansion openings (2011) are arranged inside the pressure-bearing board surface (201), and the expansion openings (2011) extend through and extend to both side surfaces of the expansion openings (2011).

3. The hollow environmentally friendly wooden decorative board according to claim 2, characterized in that: A filling groove (2021) is provided inside the composite board surface (202), and the composite board surface (202) is bonded to the wood veneer board (1) by means of an adhesive.

4. The hollow environmentally friendly wooden decorative board according to claim 3, characterized in that: The outer surface of the composite board surface (202) is provided with a keel bracket (203), and the gypsum layer board (2) is connected to the steel keel (3) through the keel bracket (203).

5. A method for preparing a hollow environmentally friendly wooden decorative board, based on the hollow environmentally friendly wooden decorative board according to claim 4, characterized in that: The steps include: Step 1: Select β-hemihydrate gypsum, add wood pulp fiber to improve crack resistance, add retarder and waterproofing agent to adjust the performance, and set the water-cement ratio at 1:60-80 to ensure the fluidity of the slurry; Step 2: Dry mix gypsum powder, fiber and modifier in proportion, add water and stir until uniform slurry, stir for 3-5 minutes, and control the slurry density at 1.2-1.5g / cm 3 ; Step 3: Pre-treat the mold, spray the release agent, lay the bottom reinforcement mesh cloth, inject the slurry into the mold, vibrate and exhaust, and then scrape the surface flat. The initial setting time is 15-20 minutes, and the final setting time of gypsum is about 30-40 minutes. Let it stand for 1-2 hours until the gypsum is completely hardened, then put it into a drying kiln at 60-80℃ and dry it for 12-24 hours. The moisture content after drying shall not be higher than 5%; Step 4: using a punching machine to punch holes in the mold of the formed gypsum layer board (2), thereby forming an expansion opening (2011) and a filling slot (2021), and then using a sanding machine to process the surface of the gypsum substrate until it is flat with a roughness Ra ≤ 3.2 μm, and then performing an electrostatic dust removal operation on the surface; Step 5: Apply adhesive to the composite board surface (202) of the gypsum board (2) and the back of the wood veneer board (1) at a coating amount of 150-200g / m 2 , let it stand for 3-5 minutes to make the adhesive semi-dry, the hot pressing equipment temperature is 80-100℃, the pressure is 0.5-1.0MPa, the time is 5-8min, and after unloading the pressure, cold press and shape for 10-15min.

6. The method for preparing a hollow environmentally friendly wooden decorative board according to claim 5, characterized in that: In the second step, 10% to 15% of hollow glass microspheres are added to reduce the density of the gypsum board.

7. The method for preparing a hollow environmentally friendly wooden decorative board according to claim 5, characterized in that: In the step 4, the distance between the expansion opening (2011) inside the gypsum layer board (2) and the surface is not less than 5 mm, and a honeycomb panel is provided inside the filling groove (2021).

8. The method for preparing a hollow environmentally friendly wooden decorative board according to claim 5, characterized in that: In the step 5, the adhesive is environmentally friendly polyurethane, which is used to bond the gypsum to the wood veneer.

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