A softwood and hardwood combination eco-soundproofing panel

Abstract

The application discloses an environment-friendly sound insulation board combined with softwood and hardwood, which comprises a first softwood layer, a second softwood layer, a third hardened wood layer and a hardwood layer which are sequentially attached, wherein the thickness of the first softwood layer is 3-8 mm, the thickness of the hardwood layer is 6-12 cm, the density of the second softwood layer is 160-190 kg / m3 and the thickness is 3-8 mm, and the density of the third hardened wood layer is 250-270 kg / m3 and the thickness is 10-15 mm. The ecological environment-friendly sound insulation board combined with softwood and hardwood solves the manufacturing method of the traditional sound insulation board, has the characteristics of firm durability, natural grain, convenient construction, safety and environmental protection, sound absorption, heat insulation, durability, comfort and strong warmth, has strong adaptability, can be combined with other materials, can maintain strength while reducing the application of hardwood, and uses cheaper softwood and oak bark to replace hardwood, and has an advantage in price.

Description

Technical Field

[0001] This invention relates to a sound insulation board, and more particularly to an environmentally friendly sound insulation board that combines cork and solid wood. Background Technology

[0002] Currently, the most common sound insulation board materials on the market are as follows:

[0003] Mineral wool board: Mineral wool board is an environmentally friendly, fire-resistant sound insulation material with good sound insulation effect, suitable for large-area sound insulation projects.

[0004] Polyurethane board: Polyurethane board is made of polyurethane foam and aluminum foil, and has good heat insulation and sound insulation properties, making it suitable for places with large temperature differences.

[0005] Rock wool board: Rock wool board is a type of board made from basalt, glass fiber and other raw materials. It has good sound insulation effect, as well as good fire resistance and heat insulation properties. It is suitable for sound insulation of walls, roofs and other places.

[0006] Fiberglass insulation: Fiberglass insulation is a thermal insulation material made of glass fiber. It has good sound insulation effect and good corrosion resistance and high temperature resistance, making it suitable for places that require sound insulation in high-strength and high-temperature environments.

[0007] However, the aforementioned soundproofing panels are not environmentally friendly enough, the materials used in their manufacture are not readily available, and the manufacturing process is complex. Therefore, a soundproofing panel made of environmentally friendly materials is needed. Summary of the Invention

[0008] To address the above shortcomings, this invention provides an environmentally friendly sound insulation board combining cork and solid wood, comprising a first cork layer and a solid wood layer. The first cork layer is made of cork bark and has a thickness of 3mm to 8mm. The solid wood layer has a thickness of 6-12cm. The first cork layer is made of a board formed by pressing cork bark, and the density of the board after pressing is 230kg / m³.

[0009] When in use, the first cork layer faces the environment requiring sound insulation.

[0010] Furthermore, the fabrication of the first cork layer includes the following steps:

[0011] Crushing step S1: After drying the cork bark, keep the moisture content at 10-15% and crush it into 2mm to 20mm cork hair particles using a crusher. Then, grind it into 8-60 mesh cork fine particles using a steel mill, with a bulk density of 65 to 75 grams per thousand cubic centimeters.

[0012] Ingredient preparation step S2: Mix cork granules of 8 to 60 mesh to form a board material with different particle sizes. Mix the prepared cork granules with polyurethane adhesive in a ratio of 4.8:1 to 5.3:1 until homogeneous.

[0013] Molding step S3: The well mixed board material and polyurethane adhesive mixture is placed into the mold for molding to obtain a template with a density of 230kg / m³;

[0014] Baking step S4: Place the mold in the oven and bake at 55°C to 65°C for 12 hours.

[0015] Cooling and demolding step S5: Demold the mold to obtain cork board. Cut the cork board into cork rolls of various specifications with a thickness of 3mm to 8mm using a roll cutter. This is the first cork layer.

[0016] Furthermore, it also includes step S6, which involves pressing cork and solid wood together: applying polyurethane adhesive to 3mm-8mm thick cork rolls and 6-12cm thick solid wood boards using an adhesive applicator, then pressing them together using a 5-ton pressure press, and then directly baking them in a high-temperature machine for 20 seconds at a temperature of 100℃-120℃. After drying, the boards are sanded with a sander and finally trimmed with an edge trimmer.

[0017] Furthermore, it also includes a second cork layer made of cork bark, which is located between the first cork layer and the solid wood layer. The second cork layer has a density of 160 kg / m³ to 190 kg / m³ and a thickness of 3-8 mm.

[0018] Furthermore, the second cork layer is manufactured using the following steps:

[0019] Crushing step S21: First, dry the cork bark, keeping the moisture content at 10-15%, and crush it into 2mm to 20mm cork hair particles using a crusher. Then, grind it into 8-60 mesh cork fine particles using a steel mill, with a bulk density of 65 to 75 grams per thousand cubic centimeters.

[0020] Ingredient preparation step S22: Mix 8-mesh to 60-mesh cork granules to form a board material with different particle sizes. Mix the prepared board material with polyurethane adhesive in a ratio of 9:1 to 10:1 until homogeneous.

[0021] Compression molding step S23: The well-stirred cork granules and polyurethane adhesive mixture is placed into a mold for compression molding. The upper and lower surfaces of the mold are provided with serrated or corrugated protrusions. A compression molding machine is used for extrusion, and the extrusion pressure is less than the compression molding pressure of the first cork layer.

[0022] Finally, cork boards with a density of 160 kg / m³ to 190 kg / m³ and a thickness of 3-8 mm were obtained;

[0023] Baking and demolding step S24: Place the mold in the oven and bake at 55℃ to 65℃ for 3-4 hours, then demold to obtain the second cork layer.

[0024] Furthermore, it also includes step S26 of pressing cork and solid wood together: First, one surface of the first cork layer is embossed to form a raised structure corresponding to the second cork layer, and the surface of the solid wood layer is also embossed to form a raised structure corresponding to the second cork layer.

[0025] The embossed side surface of the first cork layer (3mm-8mm thick), the two sides of the second cork layer (3mm-8mm thick), and the embossed side surface of the solid wood board (6-12cm thick) are all coated with polyurethane adhesive using a glue applicator. Then, they are bonded together using a press with 5 tons of pressure. After bonding, they are directly baked in a high-temperature machine for 20 seconds at a temperature of 100℃-120℃. After drying, they are sanded using a sander.

[0026] Furthermore, it also includes a third hardened wood layer, which is made of cork and is located between the second softwood layer and the solid wood layer. The density of the third hardened wood layer is 250 kg / m³ to 270 kg / m³ and the thickness is 10-15 mm.

[0027] Furthermore, the third hardened wood layer is manufactured using the following steps:

[0028] Crushing step S31: First, dry the cork bark, keeping the moisture content at 10-15%, and crush it into 2mm to 10mm cork hair particles using a crusher. Then, grind it into 8-60 mesh cork fine particles using a steel mill, with a bulk density of 65 to 75 grams per thousand cubic centimeters.

[0029] Steam heating step S32: The cork granules are placed in a mixer and high-temperature steam at 120℃-150℃ is introduced for thorough stirring to remove tannins and other substances, while softening the cell walls of the plant and squeezing out the air in the gaps between the corks.

[0030] In molding step S33, the cork granules softened by steam are naturally cooled to approximately room temperature, such as 30 degrees Celsius. The cork granules are then thoroughly mixed with a moisture-curing polyurethane adhesive at a ratio of 4:1 to 4.8:1. The mixture is then placed in a molding machine and molded under high pressure, for example, 38-42 kg / cm². 2 Maintain the pressure of the molding machine for a certain period of time, such as 5-10 minutes.

[0031] Baking step S34: Place the mold in the oven and bake at 40°C to 50°C for 12-15 hours.

[0032] Furthermore, it also includes a hot oil embossing step S35: the hardened board is cut into hardened boards with a thickness of 10-15mm, and placed under a hot oil press for embossing, so that the hardened cork board is embossed into a carbonized board with an embossed structure on one surface and a flat surface on the other.

[0033] Furthermore, it also includes a pressing step S36: the embossed side surface of the 3mm-8mm thick first cork layer, the two sides of the 3mm-8mm thick second cork layer, the two sides of the 10-15mm thick third hardened wood layer, and the surface of the 6-12cm thick solid wood board are all coated with polyurethane adhesive by a glue applicator, and then pressed together by a press with a pressure of 5 tons. After bonding, it is directly baked in a high-temperature machine for 20 seconds at a baking temperature of 100℃-120℃. After drying, it is sanded by a sander and finally trimmed with an edge trimming machine.

[0034] This invention offers the following advantages: The cork and solid wood composite eco-friendly sound insulation board solves the problems associated with traditional sound insulation board manufacturing methods. It is robust and durable, features a natural grain, is easy to install, safe and environmentally friendly, and possesses excellent sound absorption, heat insulation, durability, comfort, and warmth retention. It is ideally suited for sound insulation in residences, conference rooms, cinemas, and KTVs. It is applicable to any location, regardless of size. Its strong adaptability allows it to be combined with other materials, maintaining strength while reducing the use of solid wood by using cheaper cork and oak bark, resulting in a more competitive price. It simultaneously meets people's needs for eco-friendly, sound-absorbing, heat-insulating, durable, comfortable, and warm sound insulation. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the first embodiment of an environmentally friendly sound insulation board combining cork and solid wood according to the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of a second embodiment of an environmentally friendly sound insulation board combining cork and solid wood according to the present invention;

[0037] Figure 3 This is a structural schematic diagram of the third embodiment of an environmentally friendly sound insulation board combining cork and solid wood according to the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of a hydraulic press for an environmentally friendly sound insulation board combining cork and solid wood, as described in this invention. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1-3 As shown, the environmentally friendly sound insulation board of the present invention, which combines cork and solid wood, includes a first cork layer 1 and a solid wood layer 2. The first cork layer 1 is made of cork bark and includes the following steps:

[0041] Crushing step S1: First, dry the cork bark, keeping the moisture content at 10-15%, and crush it into 2mm to 20mm cork hair particles using a crusher. Then, grind it into 8-60 mesh cork fine particles using a steel mill, with a bulk density of 65 to 75 grams per thousand cubic centimeters.

[0042] Preparation step S2: Use cork granules of 8 to 60 mesh to prepare a board material with different particle sizes. Mix the prepared cork granules and polyurethane adhesive in a ratio of 4.8:1 to 5.3:1 until uniform. In one embodiment, 257 kg of cork granules and 51 kg of polyurethane adhesive are mixed until uniform.

[0043] Molding step S3: The well-stirred cork granules and polyurethane adhesive mixture is placed into a mold for molding to obtain a template with a density of 230 kg / m³; in this step, the mixture is loaded into a circular mold with a height of 1.5 meters and a diameter of 1 meter, and extruded using a molding machine.

[0044] Baking step S4: Place the mold in the oven and bake at 55°C to 65°C for 12 hours.

[0045] Cooling and demolding step S5: Demold the mold to obtain cork board. Cut the cork board into cork rolls of various specifications with a thickness of 3mm to 8mm using a roll cutter for later use.

[0046] Cork has an extremely fine, bubble-like cellular structure that can absorb the sound produced by the collision of various objects. Cork is environmentally friendly and formaldehyde-free.

[0047] The first layer of cork serves as sound absorption and also provides structural support for the wall; therefore, it is quite rigid.

[0048] The process also includes step S6, which involves pressing cork and solid wood together: applying polyurethane adhesive to 3mm-8mm thick cork rolls and 6-12cm thick, 1.22m wide and 2.44m long solid wood boards using an adhesive applicator, then pressing them together under 5-ton pressure. After bonding, the boards are directly baked in a high-temperature machine for 20 seconds at a temperature of 100℃-120℃. After drying, the boards are sanded and finally trimmed with an edge trimming machine. This process creates an eco-friendly sound insulation board made of cork and solid wood.

[0049] In use, the first cork layer faces the environment requiring sound insulation. The cork layer then serves to absorb sound.

[0050] In one embodiment, a second cork layer is further included, the second cork layer being made of cork bark, comprising the following steps:

[0051] Crushing step S21: First, dry the cork bark, keeping the moisture content at 10-15%, and crush it into 2mm to 20mm cork hair particles using a crusher. Then, grind it into 8-60 mesh cork fine particles using a steel mill, with a bulk density of 65 to 75 grams per thousand cubic centimeters.

[0052] Ingredient preparation step S22: Mix cork granules of 8 to 60 mesh to form a board material with different particle sizes, and mix the prepared cork granules with polyurethane adhesive in a ratio of 9 to 10 to 10.

[0053] Compression molding step S23: The well-stirred cork granules and polyurethane adhesive mixture is placed into a mold for compression molding. The upper and lower surfaces of the mold are provided with serrated or corrugated protrusions. A compression molding machine is used for extrusion, and the extrusion pressure is less than the compression molding pressure of the first cork layer.

[0054] In this step, a certain weight of board material is directly placed into the molding machine and molded in batches to obtain cork boards of the required thickness, so as to realize the direct molding and stamping of cork boards in one step.

[0055] Baking and Demolding Step S24: Place the mold in the oven and bake at 55℃ to 65℃ for 3-4 hours, then demold to obtain the second cork layer. The final product is a cork board with a density of 160 kg / m³ to 190 kg / m³ and a thickness of 3-8 mm.

[0056] The second cork layer 3 uses lower extrusion pressure and less polyurethane adhesive than the first cork layer, resulting in a more porous second cork layer. Simultaneously, direct one-time molding and stamping are used to obtain a thinner board, thus reducing the heat preservation and drying time.

[0057] refer to Figure 2 The illustration shows the board structure of the second embodiment of this application. First, one surface of the first cork layer is embossed to form a raised structure corresponding to the second cork layer. The raised structure can be trapezoidal, serrated, or wavy.

[0058] Embossing is also applied to the surface of the solid wood layer to form a raised structure corresponding to the second cork layer. The raised structure can be trapezoidal, serrated, or wavy.

[0059] The embossed side surface of the first cork layer (3mm-8mm thick), the two sides of the second cork layer (3mm-8mm thick), and the embossed side surface of the solid wood board (6-12cm thick, 1.22m wide, and 2.44m long) are all coated with polyurethane adhesive using an adhesive applicator. Then, they are pressed together using a 5-ton pressure press. After bonding, they are directly baked in a high-temperature machine for 20 seconds at a temperature of 100℃-120℃. After drying, they are sanded with a sander and finally trimmed with an edge trimming machine. This process creates an eco-friendly sound insulation board made of cork and solid wood.

[0060] This double-layer cork structure provides superior sound insulation. When sound penetrates the first cork layer and seeps into the second cork layer, the sound repeatedly collides between these raised structures due to the multiple raised structures between them. Furthermore, because the second cork layer is a softer cork layer, it can absorb sound even better.

[0061] Structurally, cork is a polyhedral material, honeycomb-like in shape, filled with air (50% of it is air), and its surface is covered with pores that allow air to pass through. When sound enters these pores, it is constantly reflected around the inner walls until the sound waves are converted into heat energy, thus achieving a good soundproofing effect.

[0062] refer to Figure 3 It illustrates a board structure according to a third embodiment of this application, which includes a third hardened wood layer 4, the third hardened wood layer 4 being manufactured using the following steps:

[0063] Crushing step S31: First, dry the cork bark, keeping the moisture content at 10-15%, and crush it into 2mm to 10mm cork hair particles using a crusher. Then, grind it into 8-60 mesh cork fine particles using a steel mill, with a bulk density of 65 to 75 grams per thousand cubic centimeters.

[0064] Steam heating step S32: Place the cork granules into a mixer and introduce high-temperature steam at 120℃-150℃ for thorough stirring to remove tannins and other substances, while softening the cell walls of the plant and squeezing out air from the gaps in the cork. The amount of steam introduced should not be excessive to avoid excessive moisture content in the cork granules.

[0065] In molding step S33, the steam-softened cork granules are naturally cooled to approximately room temperature, such as 30°C. The cork granules are then thoroughly mixed with a polyurethane adhesive, such as a moisture-curing polyurethane adhesive, at a ratio of 4:1 to 4.8:1. The mixture is then placed in a molding machine and molded under high pressure, for example, 38-42 kg / cm². 2 Maintain the pressure of the molding machine for a certain period of time, such as 10-15 minutes.

[0066] Baking step S34: Place the mold into the oven and bake at 40℃ to 50℃ for 12-15 hours to remove excess water and allow the board to dry completely; then demold to obtain the hardened board.

[0067] Hot oil embossing step S35: Cut the hardened board into 10-15mm thick pieces, place them under a hot oil press for embossing, such as... Figure 4 As shown, the hot oil press includes an upper pressure plate 11 and a lower pressure plate 12 facing each other. Both the upper and lower pressure plates 11 and 12 are hollow structures filled with heat-conducting oil at a temperature of 300℃-400℃ and have a heater 13. The upper pressure plate 11 has an embossed design, which creates a raised structure on its surface when the third hardened wood layer is pressed. This raised structure can be trapezoidal, serrated, or wavy. The lower pressure plate 12 has a flat surface, so the hardened cork board is pressed into a carbonized board with an embossed structure on one surface and a flat surface on the other. The drive device 14 of the hot oil press maintains a certain pressure for a certain period of time to press the third hardened wood layer, for example, 38-42 kg / cm². 2 The pressure is maintained for 20-30 seconds. This results in a third hardened wood layer with a density of 250 kg / m³ to 270 kg / m³. The density of the third hardened wood layer is greater than that of the first softwood layer, and the density of the first softwood layer is greater than that of the second softwood layer.

[0068] Surface carbonization of the third hardened wood layer can enhance its surface hardness and provide anti-corrosion and antibacterial effects.

[0069] In another embodiment, the upper pressure plate 11 and lower pressure plate 12 of the hot oil press are both flat structures, directly carbonizing and pressing the hardened cork board to obtain a third hardened wood layer with two flat surfaces. The upper and lower surfaces of the third hardened wood layer are then polished to form a mirror finish. Since the third hardened wood layer primarily functions to reflect sound waves, mirroring it achieves excellent sound reflection effects.

[0070] The process also includes a pressing step S36: the embossed side surface of the 3mm-8mm thick first cork layer, the two sides of the 3mm-8mm thick second cork layer, the two sides of the 10-15mm thick third hardened wood layer, and the surface of the 6-12cm thick, 1.22m wide, and 2.44m long solid wood board are all coated with polyurethane adhesive using a glue applicator. Then, they are pressed together using a 5-ton pressure press. After bonding, they are directly baked in a high-temperature machine for 20 seconds at a temperature of 100℃-120℃. After drying, they are sanded with a sander and finally trimmed with an edge trimming machine. This process forms an eco-friendly sound insulation board made of cork and solid wood.

[0071] At this point, the solid wood board does not need to be embossed. Its upper surface is bonded to the flat surface of the third hardened wood layer, which at this time partially replaces the solid wood layer.

[0072] Cork carbonization boards are characterized by high hardness and high density, which allows for excellent sound reflection. Using cork carbonization boards as a third hardened wood layer can further isolate solid wood from sound. Furthermore, the surface hardening of the cork carbonization board enhances sound reflection, while the hardened cork also prevents moisture intrusion, increasing the lifespan and structural strength of this environmentally friendly board and reducing the need for solid wood structures.

[0073] The first cork layer has a higher density and harderness than the second cork layer. Besides sound absorption, its function is to provide structural strength for the wall. Therefore, it shouldn't be too soft, otherwise the board's strength will be insufficient to support decorations and ornaments, and it will easily deform. The second cork layer has a lower density and more pores, making it easier to absorb sound. It undertakes the main sound absorption function, and with the protection of the first cork layer, it is not easily damaged and does not easily absorb moisture from the air, thus preventing mold growth. The third hardwood layer provides better support for the two cork layers. Its hard surface with a carbonized layer reflects sound. The reflected sound is further absorbed by the second and first cork layers before being transmitted back into the environment, greatly reducing the volume of sound returning to the environment. It also isolates some moisture from penetrating the solid wood, protecting the strength of the solid wood as the supporting structure and increasing its lifespan.

[0074] Cork, derived from the bark of oak trees, is highly elastic, slip-resistant, warm, sound-absorbing, heat-insulating, waterproof, and moisture-proof. It can be used for floors, walls, and bathrooms. Highly adaptable, it can be combined with other materials, absorbs noise, and can be made in various patterns to create a safe, quiet, and comfortable living environment.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An environmentally friendly sound insulation board combining cork and solid wood, characterized in that: The environmentally friendly sound insulation board comprises a first cork layer, a second cork layer, a third hardened wood layer, and a solid wood layer. The first cork layer serves to absorb sound and also provides wall support, directly facing the environment requiring sound insulation. The thickness of the first cork layer is 3mm to 8mm, and the thickness of the solid wood layer is 6-12cm. The first cork layer is made from cork granules formed by pressing, and is formed by thoroughly mixing cork granules and polyurethane adhesive in a ratio of 4.8:1 to 5.3:1 and then pressing them into a molding machine. The density of the pressed board is 230kg / m³. The second cork layer is made from cork and is located between the first cork layer and the third hardened wood layer. The density of the second cork layer is 160kg / m³. The first cork layer has a density ranging from kg / m³ to 190 kg / m³ and a thickness of 3-8 mm. The second cork layer is formed by thoroughly mixing cork granules and polyurethane adhesive in a 9:1 to 10:1 ratio and then pressing it using a molding machine. One surface of the first cork layer is embossed to create a raised structure corresponding to the second cork layer. The surface of the third hardened wood layer is also embossed to create a raised structure corresponding to the second cork layer. These raised structures are trapezoidal, serrated, or wavy. The embossed side surface of the first cork layer and the second cork layer... Both sides, the embossed surface of the upper side of the third hardened wood layer, and the side surface of the solid wood board are coated with polyurethane adhesive and then bonded together using a press. When sound penetrates the first cork layer and permeates into the second cork layer, the sound repeatedly collides between the multiple raised structures between the two. The third hardened wood layer is made of cork, and the other surface of the third hardened wood layer is a flat carbonized board. The embossed surface of the third hardened wood layer is bonded to the second cork layer, and the carbonized surface of the third hardened wood layer is bonded to the solid wood layer. The density of the third hardened wood layer is 250 kg / m³ to 270 kg / m³, and the thickness is 10-15 mm.

2. The environmentally friendly sound insulation board combining cork and solid wood according to claim 1, characterized in that: The fabrication of the first cork layer includes the following steps: Crushing step S1: After drying the cork bark, keep the moisture content at 10-15% and crush it into 2mm to 20mm cork hair particles using a crusher. Then, grind it into 8-60 mesh cork fine particles using a steel mill, with a bulk density of 65 to 75 grams per thousand cubic centimeters. Ingredient preparation step S2: Mix cork granules of 8 to 60 mesh to form a board material with different particle sizes. Mix the prepared cork granules with polyurethane adhesive in a ratio of 4.8:1 to 5.3:1 until homogeneous. Molding step S3: The well mixed board material and polyurethane adhesive mixture is placed into the mold for molding to obtain a template with a density of 230kg / m³; Baking step S4: Place the mold in the oven and bake at 55°C to 65°C for 12 hours. Cooling and demolding step S5: Demold the mold to obtain a cork board. Cut the cork board into cork rolls with a thickness of 3mm to 8mm using a roll cutter. This is the first cork layer.

3. The environmentally friendly sound insulation board combining cork and solid wood according to claim 2, characterized in that: The second cork layer is made using the following steps: Crushing step S21: First, dry the cork bark, keeping the moisture content at 10-15%, and crush it into 2mm to 20mm cork hair particles using a crusher. Then, grind it into 8-60 mesh cork fine particles using a steel mill, with a bulk density of 65 to 75 grams per thousand cubic centimeters. Ingredient preparation step S22: Mix 8-mesh to 60-mesh cork granules to form a board material with different particle sizes. Mix the prepared board material with polyurethane adhesive in a ratio of 9:1 to 10:1 until homogeneous. Compression molding step S23: The well-stirred cork granules and polyurethane adhesive mixture is placed into a mold for compression molding. The upper and lower surfaces of the mold are provided with raised structures. A compression molding machine is used for extrusion, and the extrusion pressure is less than the compression molding pressure of the first cork layer. Baking and demolding step S24: Place the mold in the oven and bake at 55℃ to 65℃ for 3-4 hours, then demold to obtain the second cork layer.

4. The environmentally friendly sound insulation board combining cork and solid wood according to claim 3, characterized in that: The third hardened wood layer is made using the following steps: Crushing step S31: First, dry the cork bark, keeping the moisture content at 10-15%, and crush it into 2mm to 10mm cork hair particles using a crusher. Then, grind it into 8-60 mesh cork fine particles using a steel mill, with a bulk density of 65 to 75 grams per thousand cubic centimeters. Steam heating step S32: The cork granules are placed in a mixer and high-temperature steam at 120℃-150℃ is introduced for thorough stirring to remove tannins and soften the cell walls of the plant, squeezing out the air in the cork gaps. In molding step S33, the cork granules softened by steam are naturally cooled to room temperature. Then, the cork granules and polyurethane adhesive are thoroughly mixed in a ratio of 4:1 to 4.8:1 and placed into a molding machine, with an application rate of 38-42 kg / cm². 2 High pressure is applied to the molding process, and the pressure of the molding machine is maintained for 5-10 minutes. Baking step S34: Place the mold into the oven and bake at 40°C to 50°C for 15 hours; then demold to obtain a hardened board.

5. The environmentally friendly sound insulation board combining cork and solid wood according to claim 4, characterized in that: It also includes a hot oil embossing step S35: the hardened board is cut into hardened boards with a thickness of 10-15mm, and placed under a hot oil press for embossing, so that the hardened cork board is embossed into a carbonized board with an embossed structure on one surface and a flat surface on the other.

6. The environmentally friendly sound insulation board combining cork and solid wood according to claim 5, characterized in that: It also includes a pressing step S36: the embossed side surface of the 3mm-8mm thick first cork layer, the two sides of the 3mm-8mm thick second cork layer, the two sides of the 10-15mm thick third hardened wood layer, and the surface of the 6-12cm thick solid wood board are all coated with polyurethane adhesive by a glue applicator, and then pressed together by a press with a pressure of 5 tons. After bonding, it is directly baked in a high-temperature machine for 20 seconds at a temperature of 100℃-120℃. After drying, it is sanded by a sander and finally trimmed with an edge trimming machine.

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