A hysteresis flexible sound insulation board and manufacturing method

Abstract

The invention discloses a hysteresis flexible sound insulation board and a manufacturing method, which belongs to the field of industrial sound insulation and vibration isolation. A hysteresis flexible sound insulation board manufacturing method comprises the following steps: stirring flexible particles, ferromagnetic particles and glue for 15 to 20 minutes to form a mixture, then moving the mixture into a mold, slowly applying pressure to the mixture for molding, and applying a magnetic field to the mixture while applying pressure, so that the ferromagnetic particles adjust their directions due to the magnetic field, stopping pressurization and applying the magnetic field after the mixture is formed, taking out the formed mixture, applying the magnetic field again after cooling, and applying the magnetic field to the mixture again, wherein the applied magnetic field strength is the same as the magnetic field strength applied during the molding process, and stopping applying the magnetic field after 25 to 35 minutes to form a hysteresis flexible sound insulation board. The hysteresis flexible sound insulation board and the manufacturing method of the invention improve the strength, rigidity and damping effect of the hysteresis flexible sound insulation board, and improve the sound insulation and vibration isolation effects of the hysteresis flexible sound insulation board.

Description

Technical Field

[0001] The invention belongs to the field of industrial sound insulation and vibration isolation, and in particular relates to a hysteresis flexible sound insulation board and a manufacturing method thereof. Background Art

[0002] Existing industrial equipment is prone to vibration and noise. To address the above problems, flexible sound insulation panels are used for sound insulation and vibration reduction.

[0003] Hysteresis phenomenon: refers to the change of the magnetization state of ferromagnetic materials always lags behind the change of the external magnetic field. After the external magnetic field is removed, the ferromagnetic materials can still maintain some of their original magnetism. When the ferromagnetic material is magnetized to the saturation state, if the magnetic field strength is gradually reduced from the maximum value, its magnetic induction intensity does not return along the original path, but decreases along a curve slightly higher than the original path. When the magnetic field strength is zero, the magnetic induction intensity is not equal to zero, that is, the change of the magnetic induction intensity in the magnetic body lags behind the change of the magnetic field strength.

[0004] The phenomenon of hysteresis is well known in ferromagnetic materials. When an external magnetic field is applied to a ferromagnetic material, the dipoles of its atoms align themselves according to the applied field. Even when the applied field is removed, part of the alignment remains. The material is magnetized and its magnetism continues to be retained. To demagnetize, a magnetic field in the opposite direction is applied. This phenomenon has a wide range of applications in electronic circuits as a physical property of the system that is very dependent on the applied field.

[0005] At present, the flexible sound insulation board is formed by adding metal particles to rubber particles and directly pressing them. The metal particles are mainly spherical, which only increases the surface density of the sound insulation board and improves the sound insulation to a certain extent. If the sound insulation and vibration isolation effects need to be further improved, the thickness of the sound insulation board will be further increased, which wastes materials. The sound insulation and vibration isolation effects of the existing flexible sound insulation board are not ideal, and the sound insulation and vibration isolation effects still need to be further improved. Summary of the invention

[0006] The purpose of the present invention is to provide a hysteresis flexible sound insulation board and a manufacturing method thereof. By adding ferromagnetic particles, a magnetic field is applied during the molding process, a hysteresis phenomenon is formed under the magnetic field, the ferromagnetic particles are magnetized, and the strength, rigidity and damping effect of the hysteresis flexible sound insulation board are improved. Not only does the thickness of the hysteresis flexible sound insulation board not increase, but also the sound insulation and vibration isolation effects of the hysteresis flexible sound insulation board are improved.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] The present invention provides a method for manufacturing a hysteresis flexible sound insulation board. The method comprises the following steps: stirring flexible particles, ferromagnetic particles and glue for 15 to 20 minutes to form a mixture, then transferring the mixture into a mold, slowly applying pressure to the mixture to form the mixture, and applying a magnetic field to the mixture while applying pressure, so that the ferromagnetic particles adjust their directions due to the magnetic field. After the mixture is formed, the pressure and the magnetic field are stopped, the formed mixture is taken out, and the hysteresis flexible sound insulation board is formed after cooling.

[0009] Preferably, the formed mixture is taken out and naturally cooled in an environment of 25 to 33° C. After cooling, a magnetic field is applied to the formed mixture again, and the applied magnetic field strength is greater than or equal to the magnetic field strength applied during the forming process. The application of the magnetic field is stopped after 25 to 35 minutes to form a hysteresis flexible sound insulation board.

[0010] Preferably, the mixture is kept warm and pressurized during the process of pressurizing and applying the magnetic field, and the time of the heat preservation and pressure preservation is 25 to 35 minutes. At the same time, water vapor is used for heat preservation, and the heat preservation temperature is 100 to 110°C.

[0011] Preferably, the formed mixture is taken out and naturally cooled in an environment of 25 to 33°C.

[0012] Preferably, the magnetic field is applied by installing battery coil devices on opposite sides of the mold.

[0013] Preferably, the ferromagnetic particles are non-spherical.

[0014] Preferably, the cross section of the ferromagnetic particles is rectangular or elliptical.

[0015] Preferably, the ratio of the flexible particles to the ferromagnetic particles is 95:5 to 85:15 by mass.

[0016] Preferably, the mass of the added glue is 5% to 15% of the total mass of the flexible particles and the ferromagnetic particles.

[0017] Preferably, the particle sizes of the ferromagnetic particles and the flexible particles are both 1 to 5 mm.

[0018] Preferably, the applied pressure is 45-55 MPa.

[0019] Preferably, the applied magnetic field strength is 300-500 A / m.

[0020] Preferably, the ferromagnetic particles are made of iron, cobalt or nickel, and the flexible particles are rubber particles, silica gel particles or resin particles.

[0021] Preferably, the glue is environmentally friendly water-based glue.

[0022] The present invention also provides a hysteresis flexible sound insulation board, which is made by the above-mentioned hysteresis flexible sound insulation board manufacturing method, and includes a flexible board body, flexible particles, and ferromagnetic particles. The flexible particles and the ferromagnetic particles are both arranged inside the flexible board body. The ferromagnetic particles are magnetized and have magnetism, and adjacent ferromagnetic particles attract or repel each other.

[0023] The beneficial effects of the present invention are:

[0024] 1. By adding ferromagnetic particles and applying a magnetic field during the molding process, hysteresis phenomenon is formed under the magnetic field, so that the ferromagnetic particles are magnetized, and the strength, stiffness and damping effect of the hysteresis flexible sound insulation board are improved. Not only does it not increase the thickness of the hysteresis flexible sound insulation board, but it also improves the sound insulation and vibration isolation effects of the hysteresis flexible sound insulation board.

[0025] 2. In order to ensure the cohesiveness of the rubber particles during the production process, the mixture is kept warm and pressurized during the process of pressurizing and applying the magnetic field.

[0026] 3. Use non-spherical ferromagnetic particles, specifically ferromagnetic particles with a rectangular or elliptical cross-section. After acquiring magnetism, non-spherical ferromagnetic particles can have a directional magnetic pole direction, especially ferromagnetic particles with a rectangular or elliptical cross-section, which have stronger directionality and are conducive to magnetization and adjustment of direction when subjected to a magnetic field.

[0027] 4. During the use of the hysteresis flexible sound insulation board, an additional magnetic field can be applied to increase the magnetic field force inside the hysteresis flexible sound insulation board, so that the strength, rigidity and damping force of the product are greatly improved, and the sound insulation and vibration isolation effects are further improved. The required sound insulation and vibration isolation effects can be adjusted by the applied magnetic field strength according to actual use requirements, which greatly improves the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the positional relationship between a battery coil device and a hysteresis flexible sound insulation board according to an embodiment of the present invention.

[0029] Figure 2 It is a schematic structural diagram of a hysteresis flexible sound insulation board according to an embodiment of the present invention.

[0030] Figure 3 It is a schematic structural diagram of a hysteresis flexible sound insulation board according to a second embodiment of the present invention.

[0031] The markings in the attached drawings are: 1- ferromagnetic particles, 2- flexible particles, 3- flexible plate, 4- battery coil device. DETAILED DESCRIPTION

[0032] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0033] Embodiment 1:

[0034] like Figure 1 As shown, a method for making a hysteresis flexible sound insulation board provided in this embodiment is to stir the flexible particles 2, the ferromagnetic particles 1 and the environmentally friendly water-based glue for 18 minutes to form a mixture, and then move the mixture into a mold, install a battery coil device 4 on the left and right sides of the mold to apply a magnetic field, and the coil can adjust the current size according to actual needs to control the magnetic field strength. The magnetic field strength applied in this embodiment is 300A / m, and the applied pressure is calculated according to the required molding thickness. The pressure applied in this embodiment is 45MPa. In this embodiment, the cover plate on the mold is used to slowly apply pressure to the mixture for molding, and the battery coil device 4 is started while applying pressure to apply a magnetic field to the mixture, so that the ferromagnetic particles 1 adjust their direction due to the magnetic field, and the dipoles of their atoms are arranged according to the external field. After the mixture is formed, the pressure is stopped, the battery coil device 4 is turned off and the magnetic field is stopped. The formed mixture is taken out and placed in an environment of 30°C for natural cooling. After cooling, the battery coil device 4 is started to apply a magnetic field to it again, and the applied magnetic field strength is the same as the magnetic field strength applied during the molding process. After 30 minutes, the battery coil device 4 is turned off and the magnetic field is stopped to form a hysteresis flexible sound insulation board. Then the products are cut, trimmed and packaged according to their specifications. The magnetic field is applied again during the production process to enhance the magnetism, and the magnetic field strength applied for the second time is required to be greater than or equal to the magnetic field strength applied for the first time, ensuring the consolidation and enhancement of the magnetism.

[0035] The flexible particles 2 of this embodiment are rubber particles, and the ferromagnetic particles 1 are magnetizable materials, specifically iron. The rubber particles are made of waste rubber raw materials such as waste rubber and waste tires, and are obtained through production processes such as cutting, crushing, screening, grinding, re-screening, and re-grinding to obtain rubber particles with a particle size of 3 mm. The particle size of the ferromagnetic particles 1 is 3 mm, and the cross-section of the ferromagnetic particles 1 is elliptical, specifically ellipsoidal. The ratio of rubber particles to magnetic particles is 95:5, and the ratio of the two particles can be adjusted according to actual conditions. The mass of the added glue is 15% of the total mass of the flexible particles and the ferromagnetic particles, which is adjusted according to actual conditions.

[0036] In order to ensure the adhesion of the rubber particles during the production process, the mixture is kept warm and pressurized during the process of pressurizing and applying the magnetic field. The heat preservation time is 30 minutes. At the same time, water vapor is used for heat preservation at a temperature of 105°C.

[0037] like Figure 2As shown, this embodiment also provides a hysteresis flexible sound insulation board, which is made by the above-mentioned hysteresis flexible sound insulation board manufacturing method, including a flexible board body 3, flexible particles 2, and ferromagnetic particles 1, the flexible particles 2 and the ferromagnetic particles 1 are both arranged inside the flexible board body 3, the ferromagnetic particles 1 are magnetized and have magnetism, and adjacent ferromagnetic particles 1 attract or repel each other.

[0038] By adding ellipsoidal ferromagnetic particles 1 inside the flexible plate body 3, the ferromagnetic particles 1 with an elliptical cross section can have a directional magnetic pole direction after obtaining magnetism, and the directional property is strong, which is conducive to magnetization and adjustment of direction when subjected to a magnetic field. During the production process, electromagnetic coil equipment is installed on the left and right sides of the flexible plate body 3 to form a magnetic field, so that the ferromagnetic particles 1 adjust their direction due to the magnetic field. After the electromagnetic coil equipment is removed, hysteresis occurs, which causes a magnetic field force to exist in the ferromagnetic particles 1, thereby improving the strength and rigidity of the ferromagnetic particles 1, and generating a damping effect when the ferromagnetic particles 1 are deformed. In this way, the hysteresis phenomenon is used to increase the strength and rigidity of the hysteresis flexible sound insulation board, thereby improving the sound insulation, vibration isolation and damping effects of the hysteresis flexible sound insulation board. During use, the hysteresis flexible sound insulation board can apply another magnetic field to improve the magnetic field force inside the hysteresis flexible sound insulation board, greatly improve the strength, rigidity and damping force of the product, and further improve the sound insulation and vibration isolation effects. The required sound insulation and vibration isolation effects can be adjusted by the applied magnetic field strength according to actual use requirements, greatly improving the scope of application. The hysteresis flexible sound insulation board can be used alone, or combined with the hysteresis flexible sound insulation board on the basis of the existing sound insulation and vibration isolation technology, so as to further improve the sound insulation and vibration isolation effects.

[0039] Embodiment 2:

[0040] A method for making a hysteresis flexible sound insulation board is provided in this embodiment. The flexible particles 2, the ferromagnetic particles 1 and the environmentally friendly water-based glue are stirred for 15 minutes to form a mixture, and then the mixture is moved into a mold. The battery coil device 4 is installed on the left and right sides of the mold to apply a magnetic field. The coil can adjust the current size according to actual needs to control the magnetic field strength. The magnetic field strength applied in this embodiment is 500A / m. The applied pressure is calculated according to the required molding thickness. The pressure applied in this embodiment is 55MPa. The mixture is slowly pressed by the cover plate on the mold for molding, and the battery coil device 4 is started to apply a magnetic field to the mixture while applying pressure, so that the ferromagnetic particles 1 adjust their directions due to the magnetic field, and the dipoles of their atoms are arranged according to the external field. After the mixture is formed, the pressure is stopped, the battery coil device 4 is turned off and the magnetic field is stopped. The formed mixture is taken out and placed in an environment of 30°C for natural cooling. After cooling, the battery coil device 4 is started to apply a magnetic field to it again. The applied magnetic field strength is the same as the magnetic field strength applied during the molding process. After 25 minutes, the battery coil device 4 is turned off and the magnetic field is stopped to form a hysteresis flexible sound insulation board. The products are then cut, trimmed and packaged according to their specifications.

[0041] The flexible particles 2 of this embodiment are rubber particles, and the ferromagnetic particles 1 are magnetizable materials, specifically iron. The rubber particles are made of waste rubber, waste tires and other waste rubber raw materials, and are obtained through production processes such as cutting, crushing, screening, grinding, re-screening, and re-grinding to obtain rubber particles with a particle size of 4 mm. The particle size of the ferromagnetic particles 1 is 4 mm, and the cross-section of the ferromagnetic particles 1 is rectangular, specifically a cuboid. The ratio of rubber particles to magnetic particles is 85:15, and the ratio of the two particles can be adjusted according to actual conditions. The mass of the added glue is 5% of the total mass of the flexible particles and the ferromagnetic particles, which is adjusted according to actual conditions.

[0042] In order to ensure the adhesion of the rubber particles during the production process, the mixture is kept warm and pressurized during the process of pressurizing and applying the magnetic field. The heat preservation time is 32 minutes. At the same time, water vapor is used for heat preservation at a temperature of 107°C.

[0043] like Figure 3 As shown, this embodiment also provides a hysteresis flexible sound insulation board, which is made by the above-mentioned hysteresis flexible sound insulation board manufacturing method, including a flexible board body 3, flexible particles 2, and ferromagnetic particles 1, the flexible particles 2 and the ferromagnetic particles 1 are both arranged inside the flexible board body 3, the ferromagnetic particles 1 are magnetized and have magnetism, and adjacent ferromagnetic particles 1 attract or repel each other.

[0044] By adding rectangular ferromagnetic particles 1 inside the flexible plate 3, the ferromagnetic particles 1 with a rectangular cross section can have a directional magnetic pole direction after acquiring magnetism, and the directivity is strong, which is conducive to magnetization and direction adjustment when subjected to a magnetic field.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a hysteresis flexible sound insulation board, characterized in that: The flexible particles, ferromagnetic particles and glue are stirred for 15 to 20 minutes to form a mixture, and then the mixture is moved into a mold, and pressure is slowly applied to the mixture to form it. A magnetic field is applied to the mixture while applying pressure, so that the ferromagnetic particles adjust their directions due to the magnetic field. After the mixture is formed, the pressure and the magnetic field are stopped, and the formed mixture is taken out. After cooling, the magnetic field is applied to the formed mixture again, and the applied magnetic field strength is greater than or equal to the magnetic field strength applied during the forming process. The magnetic field is stopped after 25 to 35 minutes to form a hysteresis flexible sound insulation board.

2. The method for manufacturing the hysteresis flexible sound insulation board according to claim 1, characterized in that: After the formed mixture is taken out, it is naturally cooled in an environment of 25 to 33°C.

3. The method for manufacturing a hysteresis flexible sound insulation board according to claim 1 or 2, characterized in that: During the process of pressurizing and forming the mixture and applying the magnetic field, the mixture is kept warm and pressurized for 25 to 35 minutes. At the same time, water vapor is used for heat preservation at a temperature of 100 to 110°C.

4. The method for manufacturing a hysteresis flexible sound insulation board according to claim 1, characterized in that: The magnetic field is applied by installing a battery coil device on opposite sides of the mold.

5. The method for manufacturing a hysteresis flexible sound insulation board according to claim 1, characterized in that: The ferromagnetic particles are non-spherical.

6. The method for manufacturing the hysteresis flexible sound insulation board according to claim 5, characterized in that: The cross section of the ferromagnetic particles is rectangular or elliptical.

7. The method for manufacturing a hysteresis flexible sound insulation board according to claim 1, characterized in that: The ratio of the flexible particles to the ferromagnetic particles is 95:5 to 85:15 by mass. The mass of the added glue is 5% to 15% of the total mass of the flexible particles and the ferromagnetic particles; The particle sizes of the ferromagnetic particles and the flexible particles are both 1-5 mm.

8. The method for manufacturing a hysteresis flexible sound insulation board according to claim 1, characterized in that: The applied pressure is 45-55MPa; The applied magnetic field strength is 300-500 A / m.

9. The method for manufacturing a hysteresis flexible sound insulation board according to claim 1, characterized in that: The material of the ferromagnetic particles is iron, cobalt or nickel; The flexible particles are rubber particles, silica gel particles or resin particles; The glue is environmentally friendly water-based glue.

10. A hysteresis flexible sound insulation board, characterized in that: Made by the method for making a hysteresis flexible sound insulation board as claimed in any one of claims 1 to 9; It includes a flexible plate body, flexible particles, and ferromagnetic particles; The flexible particles and the ferromagnetic particles are both arranged inside the flexible plate body; The ferromagnetic particles are magnetized and have magnetism, and adjacent ferromagnetic particles attract or repel each other.

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