Veneer with sound production unit and preparation method thereof

Abstract

The invention discloses a veneer with a sound production unit and a preparation method of the veneer, and aims to solve the technical problem that a current veneer only plays a role in decoration and cannot realize functional interaction. The veneer structurally comprises a veneer layer, a honeycomb core, a composite surface layer, an intelligent terminal, a vertical keel, a transverse hanging keel and the sound production unit, the composite surface layers are attached to the front face and the back face of the honeycomb core, and the facing layer is attached to one composite surface layer through a flat attaching technology and located on the upper single face of the honeycomb base plate. A Bluetooth Mesh gateway and a Zigbee are arranged in the intelligent terminal; the vertical keel is a square aluminum profile keel with the thickness being 3 mm and the length being 30 mm and is vertically fixed to the back of the panel for supporting. The veneer not only has a decoration effect, but also can realize functional interaction, and better meets the requirements of users.

Description

Technical Field

[0001] The present invention relates to the technical field of decorative panels, and in particular to a decorative panel with a sound-generating unit and a preparation method thereof. Background Art

[0002] Nowadays, with the development of the times and people's constant pursuit of a better life, the requirements for interior decoration are also gradually changing. In the past nearly 30 years, traditional smart homes have undergone profound changes from the initial emergence of the concept to their full penetration into life scenes. At present, interior decoration panels only provide decorative effects and can no longer meet the new needs of users. In particular, the widespread application of new technologies such as the Internet of Things, big data and artificial intelligence has enabled smart home products and services to achieve a qualitative leap.

[0003] In the process of realizing the invention, the inventor found that there are at least the following problems in the prior art that have not been solved: the traditional decorative panels only have a decorative effect and cannot achieve functional interaction, and the traditional sound unit is prone to sound leakage when in use, and the sound signal is easily superimposed and offset, and the traditional decorative panels have weak durability, low chemical stability, low toughness and are not resistant to high temperatures during use. Therefore, it is necessary to design a new technical solution to solve it. Summary of the invention

[0004] The object of the present invention is to provide a decorative panel with a sound-emitting unit and a preparation method thereof, so as to solve the technical problems raised by the current background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: a decorative panel with a sound unit and a preparation method thereof, comprising a decorative layer, a honeycomb core, a composite surface layer, an intelligent terminal, a vertical keel, a horizontal hanging keel and a sound unit, wherein the composite surface layer is bonded to the front and back sides of the honeycomb core, and the decorative layer is bonded to one of the composite surface layers by a flat bonding process and is located on the upper single side of the honeycomb substrate;

[0006] The smart terminal is internally provided with a Bluetooth Mesh gateway and Zigbee;

[0007] The vertical keel is a square aluminum profile keel with a thickness of 3mm and a length of 30mm, which is vertically fixed on the back of the panel for support;

[0008] The horizontal hanging keel consists of two parts, part A and part B. Part A is fixed on the back of the panel, and part B is fixed on the wall surface after primer treatment.

[0009] The sound-generating unit adopts an electric / dome-shaped speaker, and the internal structure thereof is filled with sound-absorbing materials, which can eliminate the sound wave signal on the back side of the diaphragm.

[0010] As a preferred embodiment of the present invention, the electric / dome-shaped speaker includes an inner cavity, a magnet, a voice coil, a protective cover, a vibration membrane and a centering support plate, the protective cover is located on the periphery of the vibration membrane, the centering support plate is located on both sides of the other end of the vibration membrane, the voice coil is fixedly connected to the other end of the centering support plate, the magnet is fixedly connected to the outside of the voice coil, and the inner cavity is located at the end away from the protective cover.

[0011] As a preferred embodiment of the present invention, the finishing layer is made of carbon fiber cloth;

[0012] The finishing material of the finishing layer is selected from one or more of PVC film, PP film, PET film, Lansen SPL skin and fireproof board;

[0013] The honeycomb core material is made of pure cotton paper, specifically a hexagonal honeycomb core structure with a side length of 3 mm and a height of 4 mm.

[0014] As a preferred embodiment of the present invention, the composite surface layer processing steps are as follows:

[0015] X1. First, laminate the cured honeycomb core on the flat laminating equipment. Lay the front and back sides of the honeycomb core flat and use a flat sheet to line the back and bottom to prevent the honeycomb core from deforming due to its own lack of stiffness.

[0016] X2. Then it is preheated in a heating oven, and the temperature of the glue in the glue coating machine is controlled at 120-130°C (PUR reactive hot melt adhesive);

[0017] X3. Then the honeycomb core panel enters the glue coating machine for glue coating, and then enters the roller press to bond the carbon fiber cloth. The roller press applies uniform pressure to the panel so that the carbon fiber cloth can be bonded to the honeycomb core to ensure that there is no gap between the joint surfaces;

[0018] X4. Finally, after bonding, the plates are stacked and cooled to obtain the finished Langsen honeycomb core substrate.

[0019] As a preferred embodiment of the present invention, in step X3, the board temperature at the bonding point is controlled at 25-38°C and is lower than 25°C by using a drying oven or air conditioning for heating;

[0020] In the step X4, the stacking and cooling are finally performed after lamination, and the humidity in the workshop is controlled to be above 40% RH. If it is less than 40% RH, a humidifier must be turned on.

[0021] As a preferred embodiment of the present invention, the finishing layer processing steps are as follows:

[0022] S1. First clean the substrate and the finishing material to ensure there is no dust or foreign matter on the surface;

[0023] S2. Apply two-component polyurethane glue (Shark 8409 polyurethane glue) on the substrate in advance;

[0024] S3. Lay the finishing material on the glued substrate, starting from one side and laminating slowly to prevent bubbles from forming in the middle;

[0025] S4. After lamination, place the lamination in a cold press for more than 8 hours;

[0026] S5. Cutting and trimming. The boards after bonding need to be trimmed using a CNC engraving machine or an electronic cutting machine.

[0027] As a preferred embodiment of the present invention, the honeycomb core processing steps are as follows:

[0028] M1. Prepare pure raw materials in advance, stir and fuse them, and then process them into paper. The stacking contact points of each paper are connected using phenolic, heat-resistant epoxy, and polyester resin glue. After the fixed glue solidifies, a honeycomb stack is formed. The honeycomb stack is cut into honeycomb strips according to the required core layer height (7.5mm) and stretched out;

[0029] M2. Then use the glue printing type automatic glue coating machine to coat the honeycomb core material with glue;

[0030] M3. When the honeycomb core material is glued, it is first led out from the cloth-laying drum, passed through the tensioning roller, and then to the printing roller to glue one side of the cloth, passed through the guide roller, and then to the second glue-coating roller, and glue is coated on the other side of the cloth, and then passed through the heater, overlapped with the uncoated pure cotton paper at the horizontal guide roller, and wound together on the cloth-collecting drum. When the required number of rolls is taken down, it is hot-pressed and solidified, and then cut into honeycomb strips for use;

[0031] M4. Before the pressed honeycomb core material is used in the sandwich structure, it is cut into strips of a certain width according to the required core material height by a paper cutter, and then stretched into a honeycomb grid shape, placed in a dipping tank, and impregnated with an appropriate concentration of impregnation glue for 1 to 2 minutes. The honeycomb wall material must be soaked, and multiple impregnations are used to control a certain bulk density and strength;

[0032] M5. After impregnation, it can be used for dry forming of sandwich structures after heating and curing on a flat plate or molding mold as needed. For core materials impregnated with polyester resin system, they can be directly used for sandwich structures (wet forming) after impregnation and curing.

[0033] As a preferred embodiment of the present invention, in the step M3, the honeycomb core material is first drawn out from the cloth placing drum, passes through the tensioning roller, and then goes to the rubber printing roller to apply glue on one side of the cloth, passes through the guide roller, and goes to the second rubber coating roller to apply glue on the other side of the cloth. During this process, the glue in the glue tank is transferred to the convex ring of the rubber printing roller through the rubber belt roller and the rubber transfer roller and remains on the pure cotton paper.

[0034] As a preferred embodiment of the present invention, the glue in the glue groove is transferred to the convex ring of the printing rubber roller through the glue belt roller and the glue transfer roller and remains on the pure cotton paper. If the width of the glue strip is a, the distance between two adjacent glue strips is 4a, and the convex rings of the two printing rubber rollers are offset by 2a. The design width of the convex ring is generally slightly smaller than the side length of the grid.

[0035] As a preferred embodiment of the present invention, a rubber buffer pad is used as a buffer at the contact point between the A part and the B part.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The decorative panel of the present invention not only has a decorative effect, but also can realize functional interaction and better meet the needs of users.

[0038] 2. The present invention uses pure cotton paper as the honeycomb core. The pure cotton paper does not contain wood fiber, but is 100% made of high-quality cotton fiber. The impregnated glue is made of bisphenol A epoxy resin, which solves the problem that the traditional wood fiber contains ducts (tubular structures in the wood part of the plant that mainly transport water and inorganic salts) and the cavity structure cannot be entered by glue, which will affect the sound propagation in the later stage. The cotton fiber is made into paper in a filament shape, which has the characteristics of strong durability, high chemical stability and high toughness.

[0039] 3. The surface layer of the present invention uses carbon fiber cloth, which has a carbon content of more than 90% and is a high-strength and high-modulus fiber with high temperature resistance.

[0040] 4. The facing sound board of the present invention is connected and fixed to the sound-generating device by a connection fixer (XIKA 256AP), which can be cured through a humidification reaction in the air to form an elastic substance. It can maintain its stability under the mutual vibration of the sound-generating device and the board, and can better prevent sound leakage in the places where the sound-generating unit contacts the board and where there is no contact.

[0041] 5. The cross-hanging keel of the present invention uses a rubber cushion as a buffer at the contact point between part A and part B to prevent noise caused by collision of metal parts when the wall vibrates.

[0042] 6. The sound unit of the present invention uses an electric / dome-shaped speaker, and its internal structure is filled with sound-absorbing materials to eliminate the sound wave signal on the back side of the diaphragm, avoiding the formation of a loop between the front and back sound wave signals, which causes the sound signals to be superimposed and canceled out. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0044] Figure 1 The structure diagram of the bisphenol A epoxy resin of the present invention;

[0045] Figure 2 The process diagram of the processing flow of the nest core material of the present invention;

[0046] Figure 3 It is a structural diagram of the printing glue type automatic glue coating machine of the present invention;

[0047] Figure 4 It is a schematic diagram of the installation of the vertical keel of the present invention;

[0048] Figure 5 It is a schematic diagram of the horizontal hanging keel of the present invention;

[0049] Figure 6 A schematic diagram of an intelligent terminal of the present invention;

[0050] Figure 7 It is a schematic diagram of a pronunciation unit of the present invention;

[0051] In the figure: 1. cloth placing drum; 2. tensioning roller; 3. printing rubber roller; 4. rubber delivery roller; 5. rubber belt roller; 6. guide roller; 7. heater; 8. cloth collecting drum; 9. rubber groove; 10. pressure regulating roller; 11. inner cavity; 12. magnet; 13. voice coil; 14. protective cover; 15. vibration membrane; 16. centering support plate; 17. buffer pad; 18. shock-absorbing rubber; 19. audio input line; 20. pronunciation unit; 21. intelligent terminal; 22. vertical keel. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0053] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] Example 1: A decorative panel with a sound unit and a preparation method thereof, see Figures 1 to 7 , including a facing layer, a honeycomb core, a composite surface layer, an intelligent terminal 21, a vertical keel 22, a horizontal keel and a sound unit 20, the composite surface layer is attached to the front and back sides of the honeycomb core, the facing layer is attached to a composite surface layer by a flat lamination process, and is located on the upper single side of the honeycomb substrate;

[0055] The smart terminal 21 is internally provided with a Bluetooth Mesh gateway and Zigbee, which can enable other smart devices in the same scene to interact and interact. For example, in the [Scene] function of the Mijia system APP, the temperature sensor air conditioner and humidifier are associated to achieve constant temperature and humidity indoors, or voice control music playback, and an external speaker interface is reserved, which is connected to the pronunciation unit 20 using a 3.5mm audio source cable; Figure 6 As shown, the left side of the intelligent terminal 21 is connected with a live wire and a neutral wire, the middle is connected with an audio input line 19, and the right side is connected with two external speaker wires;

[0056] The vertical keel 22 is a square aluminum profile keel with a thickness of 3 mm and a length of 30 mm, which is vertically fixed on the back of the panel for support;

[0057] The horizontal keel consists of two parts, A and B. Part A is fixed on the back of the panel, and part B is fixed on the wall after primer treatment. The contact between part A and part B uses a rubber buffer pad 17 as a buffer to prevent the noise of metal parts colliding when the wall vibrates. Figure 5 As shown;

[0058] The sound unit 20 adopts an electric / dome-shaped speaker, and its internal structure is filled with sound-absorbing materials, which can eliminate the sound wave signal on the back of the diaphragm, avoid the front and back sound wave signals from forming a loop, and cause the sound signals to be superimposed and canceled. This type of speaker has the lowest interference when the box is not installed because of its own sound-absorbing materials; Figure 7 shown.

[0059] For details, see Figure 7 The electric / dome-shaped loudspeaker includes an inner cavity 11, a magnet 12, a voice coil 13, a protective cover 14, a vibration membrane 15 and a centering support plate 16. The protective cover 14 is located on the periphery of the vibration membrane 15, the centering support plate 16 is located on both sides of the other end of the vibration membrane 15, the voice coil 13 is fixedly connected to the other end of the centering support plate 16, the magnet 12 is fixedly connected to the outside of the voice coil 13, and the inner cavity 11 is located at the end away from the protective cover 14.

[0060] Furthermore, the surface layer is made of carbon fiber cloth; carbon fiber cloth is a high-strength and high-modulus fiber with a carbon content of more than 90%, and its high-temperature resistance ranks first among all chemical fibers. It is made of acrylic fiber and viscose fiber as raw materials and is made through high-temperature oxidation and carbonization. It is an excellent material for manufacturing high-tech equipment such as aerospace.

[0061] The finishing material of the finishing layer is selected from one or more of PVC film, PP film, PET film, Lansen SPL surface skin and fireproof board;

[0062] The honeycomb core material is pure cotton paper, specifically a hexagonal honeycomb core structure with a side length of 3mm and a height of 4mm.

[0063] Furthermore, the steps of composite surface processing are as follows:

[0064] X1. First, laminate the cured honeycomb core on the flat laminating equipment. Lay the front and back sides of the honeycomb core flat and use a flat sheet to line the back and bottom to prevent the honeycomb core from deforming due to its own lack of stiffness.

[0065] X2. Then it is preheated in a heating oven, and the temperature of the glue in the glue coating machine is controlled at 120-130°C (PUR reactive hot melt adhesive);

[0066] X3. Then the honeycomb core panel enters the glue coating machine for glue coating, and then enters the roller press to bond the carbon fiber cloth (the board temperature at the bonding point is controlled at 25-38℃, and if it is lower than 25℃, use a drying tunnel or air conditioner for heating). The roller press applies uniform pressure to the panel so that the carbon fiber cloth can be bonded to the honeycomb core to ensure that there is no gap between the joint surfaces;

[0067] X4. Finally, after lamination, the panels are stacked and cooled (the humidity in the workshop is controlled at above 40% RH, and a humidifier must be turned on if it is less than 40% RH) to obtain the finished Langsen honeycomb core substrate.

[0068] It is worth mentioning that the finishing layer processing steps are as follows:

[0069] S1. First clean the substrate and the finishing material to ensure there is no dust or foreign matter on the surface;

[0070] S2. Apply two-component polyurethane glue (Shark 8409 polyurethane glue) on the substrate in advance;

[0071] S3. Lay the facing material on the glued substrate, starting from one side and laminating slowly to prevent bubbles from forming in the middle.

[0072] S4. After lamination, place the lamination in a cold press for more than 8 hours;

[0073] S5. Cutting and trimming. The boards after bonding need to be trimmed using a CNC engraving machine or an electronic cutting machine.

[0074] It is worth noting that the honeycomb core processing steps are as follows:

[0075] M1. Prepare pure raw materials in advance, stir and fuse them, and then process them into paper. The stacking contact points of each paper are connected using phenolic, heat-resistant epoxy, and polyester resin glue. After the fixed glue solidifies, a honeycomb stack is formed. The honeycomb stack is cut into honeycomb strips according to the required core layer height (7.5mm) and stretched out;

[0076] M2. Then use the glue printing type automatic glue coating machine to coat the honeycomb core material with glue;

[0077] M3. When the honeycomb core material is glued, it is first led out from the cloth-laying drum 1, passes through the tensioning roller 2, and goes to the glue-printing roller 3 to apply glue on one side of the cloth, passes through the guide roller 6, and goes to the second glue-applying roller, and applies glue on the other side of the cloth, and then passes through the heater 7, overlaps with the uncoated pure cotton paper at the horizontal guide roller 6, and is wound together on the cloth-collecting drum 8. When the required amount is wound, it is taken down, and after being hot-pressed and solidified, it is cut into honeycomb strips for use;

[0078] When the honeycomb core material is glued, it is first drawn out from the cloth placing cylinder 1, passes through the tensioning roller 2, and then goes to the glue printing roller 3 to apply glue on one side of the cloth, and then passes through the guide roller 6 to the second glue coating roller, and is glued on the other side of the cloth;

[0079] In this process, the glue in the glue groove 9 is transferred to the convex ring of the printing rubber roller 3 through the rubber belt roller 5 and the transfer roller 4 and remains on the pure cotton paper. If the width of the rubber strip is a, the distance between two adjacent rubber strips is 4a, and the convex rings of the two printing rubber rollers 3 are offset by 2a. The design width of the convex ring is generally slightly smaller than the side length of the hole grid.

[0080] M4. Before the pressed honeycomb core material is used in the sandwich structure, it is cut into strips of a certain width according to the required core material height by a paper cutter, and then stretched into a honeycomb grid shape, placed in a dipping tank 9, and impregnated with an appropriate concentration of impregnation glue for 1 to 2 minutes. The honeycomb wall material must be soaked, and multiple impregnations are used to control a certain bulk density and strength;

[0081] M5. After impregnation, it can be used for dry forming of sandwich structures after heating and curing on a flat plate or molding mold as needed. For core materials impregnated with polyester resin system, they can be directly used for sandwich structures (wet forming) after impregnation and curing.

[0082] It is worth mentioning that see Figure 3A tensioning roller 2 is installed on one side of a cloth-releasing drum 1, a printing roller is installed on the other side of the tensioning roller 2, a glue delivery roller 4 is installed on one side of a printing roller, a glue roller 5 is installed on the other side of a glue delivery roller 4, and half of the glue roller 5 is located inside a glue groove 9, a pressure regulating roller 10 is installed on the other side of the printing roller, a guide roller 6 is installed on the other side of the pressure regulating roller 10, and another pressure regulating roller 10 is installed on the other side of the guide roller 6, another printing roller is installed between the guide roller 6 and the other pressure regulating roller 10, another glue delivery roller 4 is installed below the other printing roller, another glue roller 5 is installed below the other glue delivery roller 4, and half of the other glue roller 5 is located inside another glue groove 9, a heater 7 is installed on the other side of the other pressure regulating roller 10, another guide roller 6 is installed on the other side of the heater 7, a cloth collecting reel 8 is installed on the other side of the other guide roller 6, and another cloth-releasing roller is installed below the other guide roller 6.

[0083] It is worth emphasizing that the installation steps of the decorative panel with sound unit are as follows:

[0084] Material preparation, use glue to fix the back of the panel in advance;

[0085] After the bottom wall surface is processed, the vertical keel 22 is fixed on the back of the veneer panel in advance;

[0086] A transverse keel A is fixed behind the vertical keel 22, and the distance between the two transverse keels cannot exceed 1800mm;

[0087] Fix the horizontal keel B on the flat wall surface and place the rubber buffer pad 17 in the groove of the B component;

[0088] Make the horizontal keels A and B clamp and fix each other;

[0089] Reserve an audio source line to connect the terminal controller.

[0090] It should be noted that: The sound unit is fixed: the facing sound board and the sound device are connected and fixed using a connection fixer (XIKA 256AP). This type of fixing glue ensures high-strength bonding strength. This type of glue cures quickly and can be cured through a humidification reaction in the air to form an elastic substance. It can maintain its stability under the mutual vibration of the sound device and the board, and can better prevent sound leakage in the places where the sound unit contacts and the board. A 1-2 meter sound source cable needs to be reserved on the back of the sound unit.

[0091] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0092] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A decorative panel with a sound unit, characterized in that: It comprises a facing layer, a honeycomb core, a composite surface layer, an intelligent terminal (21), a vertical keel (22), a horizontal keel and a sound unit (20), wherein the composite surface layer is bonded to the front and back sides of the honeycomb core, and the facing layer is bonded to one of the composite surface layers by a flat bonding process and is located on the upper single side of the honeycomb substrate; The smart terminal (21) is internally provided with a Bluetooth Mesh gateway and Zigbee; The vertical keel (22) is a square aluminum profile keel with a thickness of 3 mm and a length of 30 mm, which is vertically fixed on the back of the panel for support; The horizontal hanging keel consists of two parts, part A and part B. Part A is fixed on the back of the panel, and part B is fixed on the wall surface after primer treatment. The sound-generating unit (20) is an electric / dome-shaped loudspeaker, the internal structure of which is filled with sound-absorbing material, which can eliminate the sound wave signal on the back side of the diaphragm.

2. A decorative panel with a sound-emitting unit according to claim 1, characterized in that: The electric / dome-shaped loudspeaker comprises an inner cavity (11), a magnet (12), a voice coil (13), a protective cover (14), a vibration membrane (15) and a centering support plate (16); the protective cover (14) is located on the periphery of the vibration membrane (15); the centering support plate (16) is located on both sides of the other end of the vibration membrane (15); the voice coil (13) is fixedly connected to the other end of the centering support plate (16); the magnet (12) is fixedly connected to the outside of the voice coil (13); and the inner cavity (11) is located at an end away from the protective cover (14).

3. The decorative panel with a sound-emitting unit according to claim 1, characterized in that: The finishing layer is made of carbon fiber cloth; The finishing material of the finishing layer is selected from one or more of PVC film, PP film, PET film, Lansen SPL skin and fireproof board; The honeycomb core material is made of pure cotton paper, specifically a hexagonal honeycomb core structure with a side length of 3 mm and a height of 4 mm.

4. The method for preparing a decorative panel having a sound-generating unit according to claim 1, characterized in that: The composite surface layer processing steps are as follows: X1. First, laminate the cured honeycomb core on the flat laminating equipment. Lay the front and back sides of the honeycomb core flat and use a flat sheet to line the back and bottom to prevent the honeycomb core from deforming due to its own lack of stiffness. X2. Then it is preheated in a heating oven, and the temperature of the glue in the glue coating machine is controlled at 120-130°C (PUR reactive hot melt adhesive); X3. Then the honeycomb core panel enters the glue coating machine for glue coating, and then enters the roller press to bond the carbon fiber cloth. The roller press applies uniform pressure to the panel so that the carbon fiber cloth can be bonded to the honeycomb core to ensure that there is no gap between the joint surfaces; X4. Finally, after bonding, the plates are stacked and cooled to obtain the finished Langsen honeycomb core substrate.

5. The method for preparing a decorative panel having a sound-emitting unit according to claim 1, characterized in that: In step X3, the board temperature at the bonding point is controlled at 25-38°C, and the board temperature is lower than 25°C by using a drying oven or air conditioning for heating; In the step X4, the stacking and cooling are finally performed after lamination, and the humidity in the workshop is controlled to be above 40% RH. If it is less than 40% RH, a humidifier must be turned on.

6. The method for preparing a decorative panel having a sound-emitting unit according to claim 1, characterized in that: The finishing layer processing steps are as follows: S1. First clean the substrate and the finishing material to ensure there is no dust or foreign matter on the surface; S2. Apply two-component polyurethane glue (Shark 8409 polyurethane glue) on the substrate in advance; S3. Lay the facing material on the glued substrate, starting from one side and laminating slowly to prevent bubbles from forming in the middle. S4. After lamination, place the lamination in a cold press for more than 8 hours; S5. Cutting and trimming. The boards after bonding need to be trimmed using a CNC engraving machine or an electronic cutting machine.

7. The method for preparing a decorative panel having a sound-generating unit according to claim 1, characterized in that: The honeycomb core processing steps are as follows: M1. Prepare pure raw materials in advance, stir and fuse them, and then process them into paper. The stacking contact points of each paper are connected using phenolic, heat-resistant epoxy, and polyester resin glue. After the fixed glue solidifies, a honeycomb stack is formed. The honeycomb stack is cut into honeycomb strips according to the required core layer height (7.5mm) and stretched out; M2. Then use the glue printing type automatic glue coating machine to coat the honeycomb core material with glue; M3. When the honeycomb core material is coated with glue, it is first drawn out from the cloth placing drum (1), passes through the tensioning roller (2), and then to the printing glue roller (3) to coat one side of the cloth with glue. After passing through the guide roller (6), it goes to the second coating roller and coats the other side of the cloth with glue. Then, it passes through the heater (7), overlaps with the uncoated pure cotton paper at the horizontal guide roller (6), and is wound together on the cloth collecting drum (8). When the required amount is wound, it is taken down, and after being cured by heat pressing, it is cut into honeycomb strips for use. M4. Before the pressed honeycomb core material is used in the sandwich structure, it is cut into strips of a certain width according to the required core material height using a paper cutter, and then stretched into a honeycomb grid shape, placed in a dipping tank (9), and impregnated with an appropriate concentration of impregnation glue for 1 to 2 minutes. The honeycomb wall material must be impregnated, and multiple impregnations are used to control a certain bulk density and strength; M5. After impregnation, it can be used for dry forming of sandwich structures after heating and curing on a flat plate or molding mold as needed. For core materials impregnated with polyester resin system, they can be directly used for sandwich structures (wet forming) after impregnation and curing.

8. The method for preparing a decorative panel having a sound-emitting unit according to claim 7, characterized in that: In the step M3, the honeycomb core material is first drawn out from the cloth placing cylinder (1), passes through the tensioning roller (2), and then to the rubber printing roller (3) to be coated with glue on one side of the cloth. After passing through the guide roller (6), it reaches the second rubber coating roller and is coated with glue on the other side of the cloth. During this process, the glue in the glue groove (9) is transferred to the convex ring of the rubber printing roller (3) through the rubber belt roller (5) and the rubber transfer roller (4) and remains on the pure cotton paper.

9. A decorative panel with a sound-emitting unit and a method for preparing the same according to claim 8, characterized in that: The glue liquid in the glue groove (9) is transferred to the convex ring of the printing glue roller (3) through the glue belt roller (5) and the glue transfer roller (4) and remains on the pure cotton paper. If the width of the glue strip is a, the distance between two adjacent glue strips is 4a. The convex rings of the two printing glue rollers (3) are offset by 2a. The design width of the convex ring is generally slightly smaller than the side length of the grid.

10. A decorative panel with a sound-generating unit and a preparation method thereof according to claim 1, characterized in that: A rubber cushion (17) is used as a buffer at the contact point between the A part and the B part.

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